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1.
China Journal of Chinese Materia Medica ; (24): 2464-2470, 2023.
Article in Chinese | WPRIM | ID: wpr-981322

ABSTRACT

This paper explored the chemical constituents of Boswellia carterii by column chromatography on silica gel, Sephadex LH-20, ODS column chromatography, and semi-preparative HPLC. The structures of the compounds were identified by physicochemical properties and spectroscopic data such as infrared radiation(IR), ultra violet(UV), mass spectrometry(MS), and nuclear magnetic resonance(NMR). Seven diterpenoids were isolated and purified from n-hexane of B. carterii. The isolates were identified as(1S,3E,7E,11R,12R)-11-hydroxy-1-isopropyl-4,8,12-trimethyl-15-oxabicyclo[10.2.1]pentadeca-3,7-dien-5-one(1),(1R,3S,4R,7E,11E)-4,8,12,15,15-pentamethyl-14-oxabicyclo[11.2.1]hexadeca-7,11-dien-4-ol(2), incensole(3),(-)-(R)-nephthenol(4), euphraticanoid F(5), dilospirane B(6), and dictyotin C(7). Among them, compounds 1 and 2 were new and their absolute configurations were determined by comparison of the calculated and experimental electronic circular dichroisms(ECDs). Compounds 6 and 7 were obtained from B. carterii for the first time.


Subject(s)
Molecular Structure , Boswellia/chemistry , Diterpenes/chemistry , Mass Spectrometry
2.
China Journal of Chinese Materia Medica ; (24): 1553-1557, 2023.
Article in Chinese | WPRIM | ID: wpr-970627

ABSTRACT

Two prenylated 2-arylbenzofurans were isolated from roots of Artocarpus heterophyllus, with a combination of various chromatographic approaches, including ODS, MCI, Sephadex LH-20, and semipreparative high performance liquid chromatography(HPLC). They were identified as 5-[6-hydroxy-4-methoxy-5,7-bis(3-methylbut-2-enyl)benzofuran-2-yl]-1,3-benzenediol(1) and 5-[2H,9H-2,2,9,9-tetramethyl-furo[2,3-f]pyrano[2,3-h][1]benzopyran-6-yl]-1,3-benzenediol(2) with spectroscopic methods, such as HR-ESI-MS, IR, 1D NMR, and 2D NMR, and named artoheterins B(1) and C(2), respectively. The anti-respiratory burst activities of the two compounds were evaluated with rat polymorphonuclear neutrophils(PMNs) stimulated by phorbol 12-myristate 13-acetate(PMA). The results showed that 1 and 2 exhibited significant inhibitory effect on respiratory burst of PMNs with IC_(50) values of 0.27 and 1.53 μmol·L~(-1), respectively.


Subject(s)
Rats , Animals , Molecular Structure , Artocarpus/chemistry , Plant Extracts/pharmacology , Magnetic Resonance Spectroscopy , Plant Roots/chemistry
3.
China Journal of Chinese Materia Medica ; (24): 1273-1279, 2023.
Article in Chinese | WPRIM | ID: wpr-970598

ABSTRACT

To elucidate the chemical material basis of Rhododendron nivale, this study comprehensively used various chromatographic techniques to isolate and obtain five new meroterpenoid enantiomers(1a/1b-5a/5b) from the ethyl acetate extract of R. nivale. A variety of spectral analytical methods, such as high-resolution mass spectrometry(HRMS), nuclear magnetic resonance spectroscopy(NMR), and infrared(IR) spectrum, were used to evaluate the structure, combined with the measurement and calculation of electronic circular dichroism(ECD). The new compounds 1a/1b-4a/4b were named as(±)-nivalones A-B(1a/1b-2a/2b) and(±)-nivalnoids C-D(3a/3b-4a/4b), along with one known enantiomer(±)-anthoponoid G(5a/5b). Human neuroblastoma cells(SH-SY5Y cells) induced by hydrogen peroxide(H_2O_2) were used as oxidative stress models to evaluate the protective activity of the isolated compounds against oxidative damage to nerve cells. It was found that compounds 2a and 3a had a certain protective effect on nerve cells against H_2O_2-induced oxidative damage at concentrations of 50 μmol·L~(-1), which increased the cell survival rate from 44.02%±2.30% to 67.82%±1.12% and 62.20%±1.87%, respectively. Other compounds did not show a significant ability to protect cells from oxidative damage. These findings enrich the chemical constituents of R. nivale and provide valuable information for identifying the structure of its meroterpenoids.


Subject(s)
Humans , Rhododendron/chemistry , Neuroblastoma , Oxidative Stress , Magnetic Resonance Spectroscopy , Stereoisomerism , Molecular Structure
4.
China Journal of Chinese Materia Medica ; (24): 96-104, 2023.
Article in Chinese | WPRIM | ID: wpr-970505

ABSTRACT

By various chromatographic techniques and extensive spectroscopic methods, 17 abietane diterpenoids were isolated from the dichloromethane fraction of the 95% ethanol cold-soak extracts of the seeds of Pseudolarix amabilis, namely pseudoamaol A(1), 12α-hydroxyabietic acid(2), 12-methoxy-7,13-abietadien-18-oic acid(3), 13-hydroxy-8,11,13-podocarpatrien-18-oic acid(4), 15-hydroxy-7,13-abietadien-12-on-18-oic acid(5), 8(14)-podocarpen-13-on-18-oic acid(6), holophyllin K(7), metaglyptin B(8), 7α-hydroxydehydroabietinsaure-methylester(9), 7-oxodehydroabietic acid(10), 15-hydroxy-7-oxodehydroabietinsaure-methy-lester(11), 15-methoxydidehydroabietic acid(12), 7-oxo-15-hydroxy-dehydroabietic acid(13), 15-hydroxydehydroabietic acid(14), 8,11,13-abietatriene-15,18-diol(15), 8,11,13-abietatriene-15-hydroxy-18-succinic acid(16), and 7β-hydroxydehydroabie-tic acid(17). Compound 1 was a new compound. The isolated compounds were evaluated for their antitumor activities(HepG2, SH-SY5Y, K562), and compounds 8 and 17 showed potential cytotoxic activity against K562 cells, with IC_(50) values of 26.77 and 37.35 μmol·L~(-1), respectively.


Subject(s)
Humans , Molecular Structure , Neuroblastoma , Diterpenes/chemistry , Antineoplastic Agents
5.
China Journal of Chinese Materia Medica ; (24): 421-429, 2023.
Article in Chinese | WPRIM | ID: wpr-970479

ABSTRACT

The chemical constituents in the ethanol extract of Hypericum wightianum(Hypericaceae) were purified by column chromatography and identified via magnetic resonance imaging(NMR), high-resolution mass spectrum, and circular dichroism. A total of 22 compounds were identified, including eight polyprenylated phloroglucinols(1-8), three chromones(9-11), and three terpenoids(14-16) and so on. Among them, compounds 16 and 17 were first reported in the genus Hypericum, and compounds 1-11, 14, 15, and 19 were first isolated from H. wightianum. Compounds 1-4 were previously reported as two pairs of enantiomers. This study reported the chiral resolutions and absolute configurations of compounds 1-4 for the first time.


Subject(s)
Phloroglucinol , Hypericum/chemistry , Molecular Structure , Magnetic Resonance Spectroscopy , Drugs, Chinese Herbal/chemistry
6.
Chinese Journal of Natural Medicines (English Ed.) ; (6): 551-560, 2023.
Article in English | WPRIM | ID: wpr-982724

ABSTRACT

Phytochemical investigation on the ethanol extract of a well-known medicinal herb Leonurus japonicus, led to the separation of 18 labdane type diterpenoids (1-18). Through comprehensive spectroscopic analyses and quantum chemical calculations, these compounds were structurally characterized as six new interesting 5,5,5-di-spirocyclic ones (1-6), two new (7 and 8) and six known (13-18) interesting 6,5,5-di-spirocyclic ones, a new rare 14,15-dinor derivative (9), and three new ones incorporating a γ-lactone unit (10-12). An in vitro neuroprotective assay in RSC96 cells revealed that compounds 7 and 12 exhibited neuroprotective activity in a concentration-dependent way, comparable to the reference drug N-acetylcysteine.


Subject(s)
Magnetic Resonance Spectroscopy , Leonurus/chemistry , Plants, Medicinal , Diterpenes/chemistry , Plant Components, Aerial , Molecular Structure
7.
Chinese Journal of Natural Medicines (English Ed.) ; (6): 443-453, 2023.
Article in English | WPRIM | ID: wpr-982715

ABSTRACT

This study employed the α-glucosidase inhibitory activity model as an anti-diabetic assay and implemented a bioactivity-guided isolation strategy to identify novel natural compounds with potential therapeutic properties. Hypericum sampsoniiwas investigated, leading to the isolation of two highly modified seco-polycyclic polyprenylated acylphloroglucinols (PPAPs) (1 and 2), eight phenolic derivatives (3-10), and four terpene derivatives (11-14). The structures of compounds 1 and 2, featuring an unprecedented octahydro-2H-chromen-2-one ring system, were fully characterized using extensive spectroscopic data and quantum chemistry calculations. Six compounds (1, 5-7, 9, and 14) exhibited potential inhibitory effects against α-glucosidase, with IC50 values ranging from 0.050 ± 0.0016 to 366.70 ± 11.08 μg·mL-1. Notably, compound 5 (0.050 ± 0.0016 μg·mL-1) was identified as the most potential α-glucosidase inhibitor, with an inhibitory effect about 6900 times stronger than the positive control, acarbose (IC50 = 346.63 ± 15.65 μg·mL-1). A docking study was conducted to predict molecular interactions between two compounds (1 and 5) and α-glucosidase, and the hypothetical biosynthetic pathways of the two unprecedented seco-PPAPs were proposed.


Subject(s)
Molecular Structure , Hypericum/chemistry , alpha-Glucosidases , Magnetic Resonance Spectroscopy , Glycoside Hydrolase Inhibitors/pharmacology
8.
Chinese Journal of Natural Medicines (English Ed.) ; (6): 298-307, 2023.
Article in English | WPRIM | ID: wpr-982701

ABSTRACT

Five new terpenoids, including two vibsane-type diterpenoids (1, 2) and three iridoid allosides (3-5), together with eight known ones, were isolated from the leaves and twigs of Viburnum odoratissimum var.sessiliflorum. Their planar structures and relative configurations were determined by spectroscopic methods, especially 2D NMR techniques. The sugar moieties of the iridoids were confirmed as β-D-allose by GC analysis after acid hydrolysis and acetylation. The absolute configurations of neovibsanin Q (1) and dehydrovibsanol B (2) were determined by quantum chemical calculation of their theoretical electronic circular dichroism (ECD) spectra and Rh2(OCOCF3)4-induced ECD analysis. The anti-inflammatory activities of compounds 1, 3, 4, and 5 were evaluated using an LPS-induced RAW264.7 cell model. Compounds 3suppressed the release of NO in a dose-dependent manner, with an IC50 value of 55.64 μmol·L-1. The cytotoxicities of compounds 1-5 on HCT-116 cells were assessed and the results showed that compounds 2 and 3 exhibited moderate inhibitory activities with IC50 values of 13.8 and 12.3 μmol·L-1, respectively.


Subject(s)
Terpenes/pharmacology , Viburnum/chemistry , Molecular Structure , Diterpenes/chemistry , Plant Leaves/chemistry
9.
Chinese Journal of Natural Medicines (English Ed.) ; (6): 292-297, 2023.
Article in English | WPRIM | ID: wpr-982700

ABSTRACT

Five new flavonoid derivatives, cajavolubones A-E (1-5), along with six known analogues (6-11) were isolated from Cajanus volubilis, and their structures were elucidated by spectroscopic analysis and quantum chemical calculations. Cajavolubones A and B (1 and 2) were identified as two geranylated chalcones. Cajavolubone C (3) was a prenylated flavone, while cajavolubones D and E (4 and 5) were two prenylated isoflavanones. Compounds 3, 8, 9 and 11 displayed cytotoxicity against HCT-116 cancer cell line.


Subject(s)
Flavonoids/chemistry , Cajanus , Molecular Structure , Chalcones/chemistry
10.
China Journal of Chinese Materia Medica ; (24): 3765-3773, 2023.
Article in Chinese | WPRIM | ID: wpr-981509

ABSTRACT

Small-molecule compounds with rich sources have diverse structures and activities. The active ingredients in traditional Chinese medicine(TCM) provide new sources for the discovery of new antitumor drugs. Aconitum plants as Chinese medicinal plants have the effects of dispelling wind, removing dampness, warming meridian, and relieving pain. They are mainly used to treat inflammation, pain, rheumatism, and tumors, improve heart function, and dilate blood vessels in clinical practice. Diterpenoid alkaloids are the main active components of Aconitum plants, including C20-, C19-, C18-diterpenoid alkaloids and bis-diterpenoid alkaloids. Stu-dies have demonstrated that diterpenoid alkaloids can effectively treat lung cancer, liver cancer, breast cancer, colon cancer and other cancers. Diterpenoid alkaloids are considered as the most promising natural compounds against cancers. In this review, we summarized the chemical structures and antitumor activities of C20-, C19-, C18-diterpenoid alkaloids and bis-diterpenoid alkaloids extracted from plants of Aconitum, aiming to provide reference for further development of diterpenoid alkaloids from Aconitum as antitumor drugs.


Subject(s)
Humans , Aconitum/chemistry , Molecular Structure , Alkaloids/analysis , Diterpenes/chemistry , Antineoplastic Agents/chemistry , Plant Roots/chemistry
11.
Chinese Journal of Natural Medicines (English Ed.) ; (6): 233-240, 2023.
Article in English | WPRIM | ID: wpr-971681

ABSTRACT

The stem and branch extract of Tripterygium wilfordii (Celastraceae) afforded seven new dihydroagarofuran sesquiterpene polyesters [tripterysines A-G (1-7)] and eight known ones (8-15). The chemical structures of these new compounds were established based on combinational analysis of HR-ESI-MS and NMR techniques. The absolute configurations of tripterysines A-C (1-3) and E-G (5-7) were determined by X-ray crystallographic analysis and circular dichroism spectra. All the compounds were screened for their inhibitory effect on inflammation through determining their inhibitory effect on nitric oxide production in LPS-induced RAW 264.7 cells and the secretion of inflammatory cytokines TNF-α and IL-6 in LPS-induced BV2 macrophages. Compound 9 exhibited significant inhibitory activity on NO production with an IC50 value of 8.77 μmol·L-1. Moreover, compound 7 showed the strongest inhibitory effect with the secretion of IL-6 at 27.36%.


Subject(s)
Tripterygium/chemistry , Esters/pharmacology , Interleukin-6 , Lipopolysaccharides/pharmacology , Plant Leaves/chemistry , Anti-Inflammatory Agents/chemistry , Nitric Oxide/analysis , Sesquiterpenes/chemistry , Molecular Structure
12.
Chinese Journal of Natural Medicines (English Ed.) ; (6): 226-232, 2023.
Article in English | WPRIM | ID: wpr-971680

ABSTRACT

Five new spirostanol saponins (1-5) and seven known compounds (6-12) were isolated from the n-butanol fraction of 75% ethanol extract of Allii Macrostemonis Bulbus. The identification and structural elucidation of all the isolates were performed through extensive 1D and 2D NMR experiments, HR-ESI-MS data analysis and comparisons with literature values. Antioxidant evaluation showed that compounds 6-11 exhibited certain scavenging effects on ABTS radical, where compounds 6, 7 and 11 had IC50 values of 0.208, 0.057 and 0.014 mg·mL-1, respectively.


Subject(s)
Saponins/chemistry , Drugs, Chinese Herbal/chemistry , Magnetic Resonance Spectroscopy , Antioxidants/pharmacology , Molecular Structure
13.
Chinese Journal of Natural Medicines (English Ed.) ; (6): 58-64, 2023.
Article in English | WPRIM | ID: wpr-971664

ABSTRACT

Drimane-type sesquiterpenoids are widely distributed in fungi. From the ethyl acetate extract of the earwig-derived Aspergillus sp. NF2396, seven new drimane-type sesquiterpenoids, named drimanenoids A-G (1-7), were isolated. Their structures were elucidated by diverse spectroscopic analysis including high-resolution ESI-MS, one- and two-dimensional NMR spectroscopy. Drimanenoids A-F (1-6) are new members of drimane-type sesquiterpenoid esterified with unsaturated fatty acid side chain at C-6. Drimanenoids C (3), D (4) and F (6) showed antibacterial activity against five types of bacteria with different inhibition diameters. Drimanenoid D (4) exhibited moderate cytotoxicity against human myelogenous leukemia cell line K562 with an IC50 value of 12.88 ± 0.11 μmol·L-1.


Subject(s)
Humans , Polycyclic Sesquiterpenes , Sesquiterpenes/chemistry , Aspergillus/chemistry , Magnetic Resonance Spectroscopy , Molecular Structure
14.
Biol. Res ; 55: 4-4, 2022. ilus, graf
Article in English | LILACS | ID: biblio-1383909

ABSTRACT

BACKGROUND: The internal NAD(P)H dehydrogenase (NDA) gene family was a member of the NAD(P)H dehydrogenase (ND) gene family, mainly involved in the non-phosphorylated respiratory pathways in mitochondria and played crucial roles in response to abiotic stress. METHODS: The whole genome identification, structure analysis and expression pattern of NDA gene family were conducted to analyze the NDA gene family. RESULTS: There were 51, 52, 26, and 24 NDA genes identified in G. hirsutum, G. barbadense, G. arboreum and G. raimondii, respectively. According to the structural characteristics of genes and traits of phylogenetic tree, we divided the NDA gene family into 8 clades. Gene structure analysis showed that the NDA gene family was relatively conservative. The four Gossypium species had good collinearity, and segmental duplication played an important role in the evolution of the NDA gene family. Analysis of cis-elements showed that most GhNDA genes contained cis-elements related to light response and plant hormones (ABA, MeJA and GA). The analysis of the expression patterns of GhNDA genes under different alkaline stress showed that GhNDA genes were actively involved in the response to alkaline stress, possibly through different molecular mechanisms. By analyzing the existing RNA-Seq data after alkaline stress, it was found that an NDA family gene GhNDA32 was expressed, and then theGhNDA32 was silenced by virus-induced gene silencing (VIGS). By observing the phenotype, we found that the wilting degree of silenced plants was much higher than that of the control plant after alkaline treatment, suggesting that GhNDA32 gene was involved in the response to alkaline stress. CONCLUSIONS: In this study, GhNDAs participated in response to alkaline stress, especially NaHCO3 stress. It was of great significance for the future research on the molecular mechanism of NDA gene family in responding to abiotic stresses.


Subject(s)
Gene Expression Regulation, Plant , Gossypium/genetics , Phylogeny , Plant Proteins/genetics , Plant Proteins/metabolism , Stress, Physiological/genetics , Molecular Structure , Multigene Family/genetics , Genome, Plant
15.
Braz. J. Pharm. Sci. (Online) ; 58: e19731, 2022. tab, graf
Article in English | LILACS | ID: biblio-1394038

ABSTRACT

Abstract Poorly water-soluble drugs, such as the antifungal drug griseofulvin (GF), exhibit limited bioavailability, despite their high membrane permeability. Several technological approaches have been proposed to enhance the water solubility and bioavailability of GF, including micellar solubilization. Poloxamers are amphiphilic block copolymers that increase drug solubility by forming micelles and supra-micellar structures via molecular self-association. In this regard, the aim of this study was to evaluate the water solubility increment of GF by poloxamer 407 (P407) and its effect on the antifungal activity against three Trichophyton mentagrophytes and two T. rubrum isolates. The GF water solubility profile with P407 revealed a non-linear behavior, well-fitted by the sigmoid model of Morgan-Mercer-Flodin. The polymer promoted an 8-fold increase in GF water solubility. Fourier-transform infrared (FT-IR) spectroscopy, differential scanning calorimetry (DSC), and 2D nuclear magnetic resonance (NMR Roesy) spectroscopy suggested a GF-P407 interaction, which occurs in the GF cyclohexene ring. These results were supported by an increase in the water solubility of the GF impurities with the same molecular structure. The MIC values recorded for GF ranged from 0.0028 to 0.0172 mM, except for T. Mentagrophytes TME34. Notably, the micellar solubilization of GF did not increase its antifungal activity, which could be related to the high binding constant between GF and P407.


Subject(s)
Solubility , Spectrum Analysis/methods , Trichophyton/classification , Poloxamer/analogs & derivatives , Griseofulvin/agonists , Pharmaceutical Preparations/administration & dosage , Biological Availability , Magnetic Resonance Spectroscopy/methods , Molecular Structure , Antifungal Agents/administration & dosage
16.
São Paulo; s.n; s.n; 2022. 59 p. tab, graf, ilus.
Thesis in Portuguese | LILACS | ID: biblio-1415044

ABSTRACT

Na área da saúde pública, as doenças provocadas pela radiação solar têm ganho grande destaque, por serem cada vez mais comuns. Dentre as principais formas de prevenção a utilização de filtros solares são as mais comuns e de fácil acesso. Os filtros utilizados atuam por sua capacidade de refletir, absorver ou dispersar os raios solares ultravioletas (UV). A aplicação de métodos teóricos tornou-se indispensável no auxílio do planejamento de novos compostos com função terapêutica, em estudos de suas diferentes propriedades, buscando gerar, manipular e analisar representações realistas de estruturas moleculares obtidas a partir de cálculos de propriedades físico-químicas por meio da química computacional. Neste estudo, foram selecionados compostos naturais de origem vegetal (3-O-metilquercetina, ácido gálico, aloína, catequina, quercetina e resveratrol), os quais são descritos com propriedades fotoprotetoras, para os quais se aplicou métodos computacionais para predição dos espectros de absorção, por meio do método TD-DFT (Teoria funcional da densidade dependente do tempo). Foram avaliadas as principais transições eletrônicas dos compostos estudados e se as diferenças de energia HOMO e LUMO para os compostos que absorvem na faixa UV compreendem na UVA (320400 nm, 3.103.87 eV), UVB (290320 nm, 3.874.27 eV) ou na UVC (100290 nm, 4.2712.4 eV). Realizou-se a validação experimental para o método aplicado para o EMC, quercetina e resveratrol, demonstrando a eficácia. Após os estudos realizados concluímos que o resveratrol, teoricamente é um ótimo candidato a fotoprotetor. O estudo ofereceu informações relevantes sobre o poder de predição in silico para fotoprotetores, e se utilizado pode contribuir diminuindo de tempo e custos em pesquisas para desenvolver fármacos


In the area of public health, diseases caused by solar radiation have gained great prominence, as they are increasingly common. Among the main ways to prevent the use of sunscreens are the most common and easily accessible. The filters used act by their ability to reflect, absorb or scatter the sun's ultraviolet (UV) rays. The application of theoretical methods has become indispensable in helping to plan new compounds with therapeutic function, in studies of their different properties, seeking to generate, manipulate and analyze realistic representations of molecular structures obtained from calculations of physicochemical properties through computational chemistry. In this study, natural compounds of plant origin (3-O-methylquercetin, gallic acid, aloin, catechin, quercetin, and resveratrol) were selected, which are described with photoprotective properties, for which computational methods were applied to predict the absorption spectra, using the TD-DFT (Time-Dependent Density Functional Theory) method. The main electronic transitions of the studied compounds were evaluated and whether the differences in HOMO and LUMO energy for compounds that absorb in the UV range comprise UVA (320400 nm, 3.103.87 eV), UVB (290 320 nm, 3.87 4.27 eV) or UVC (100290 nm, 4.2712.4 eV). Experimental validation was carried out for the method applied for CME, quercetin, and resveratrol, demonstrating its effectiveness. After the studies carried out, we concluded that resveratrol, theoretically, is an excellent candidate for sunscreen. The study provided relevant information about the in silico predictive power for photoprotectors, and if used, it can contribute to reducing time and costs in research to develop drugs


Subject(s)
Sunscreening Agents/analysis , Biological Products/adverse effects , Pharmaceutical Preparations/analysis , Ultraviolet Filters , Sun Protection Factor/instrumentation , Ultraviolet Rays/adverse effects , Molecular Structure , Solar Radiation , Density Functional Theory
17.
China Journal of Chinese Materia Medica ; (24): 433-436, 2022.
Article in Chinese | WPRIM | ID: wpr-927986

ABSTRACT

The genus Rabdosia is famous for the abundance of diverse and novel ent-kaurane diterpenoids. However, only a few ent-kauranoids have been discovered from R. flexicaulis since the investigation on its chemical constituents is not systematic. To find novel bioactive diterpenoids, the ethyl acetate extract of the above ground part of R. flexicaulis in Daofu County, Sichuan Province was obtained by column chromatography. One new compound and five known ones were identified as flexicaulin E(1), forrestin B(2), inf-lexarabdonin D(3), 7α-hydroxydehydroabietic acid(4), 15-hydroxydehydroabietic acid(5), and pomiferin F(6) by spectral techniques. Compounds 1-3 were the ent-kaurane diterpenoids isolated from this species for the first time. Compounds 4-6, aromatic abie-tanoids, were isolated from the genus Rabdosia for the first time.


Subject(s)
Diterpenes , Diterpenes, Kaurane , Isodon/chemistry , Molecular Structure , Plant Extracts/chemistry
18.
Chinese Journal of Natural Medicines (English Ed.) ; (6): 215-220, 2022.
Article in English | WPRIM | ID: wpr-929254

ABSTRACT

Sarglanoids A-F, six new sesquiterpenoids belonging to eudesmane (1-5) and eremophilane (6) types, were isolated from the leaves of Sarcandra glabra, a famous traditional Chinese medicine (TCM). Their structures including absolute configurations were elucidated through extensive spectroscopic analysis and electronic circular dichroism (ECD) calculations. Compounds 1-2 were rare N-containing eudesmane-type sesquiterpenoids. Compound 3 exhibited inhibitory activity against nitric oxide (NO) production in lipopolysaccharides (LPS)-induced RAW 264.7 cells with IC50 values at 20.00 ± 1.30 μmol·L-1. These findings provide scientific evidence for sesquiterpenoids as the material foundation of S. glabra.


Subject(s)
Molecular Structure , Plant Leaves , Polycyclic Sesquiterpenes , Seeds , Sesquiterpenes/pharmacology
19.
Chinese Journal of Natural Medicines (English Ed.) ; (6): 155-160, 2022.
Article in English | WPRIM | ID: wpr-929246

ABSTRACT

Three new ursane-type triterpenoids, 3-oxours-12-en-20, 28-olide (1), 3β-hydroxyurs-12-en-20, 28-olide (2) and 3β-hydroxyurs-11, 13(18)-dien-20, 28-olide (3), were isolated from a potent anti-inflammatory and antibacterial fraction of the ethanolic extract of Rosmarinus officinalis. Their structures were elucidated by a combination of extensive 1D- and 2D-NMR experiments, MS data and comparisons with literature reports. Compounds 1-3 exhibited significantly inhibitory effects on nitric oxide production in lipopolysaccharide-activated mouse RAW264.7 macrophages, but no antibacterial activity was found at a concentration of 128 μg·mL-1.


Subject(s)
Animals , Mice , Drugs, Chinese Herbal/chemistry , Molecular Structure , Rosmarinus , Triterpenes/chemistry
20.
Chinese Journal of Natural Medicines (English Ed.) ; (6): 537-540, 2022.
Article in English | WPRIM | ID: wpr-939918

ABSTRACT

Four new diphenyl ethers, named epicoccethers K-N (1-4), were purified from the fermentation medium of a fungus Epicoccum sorghinum derived from Myoporum bontioides, and identified through HR-ESI-MS and NMR spectral analysis. Except that compound 1 showed moderate antifungal activity against Penicillium italicum and Fusarium graminearum, the other three compounds showed stronger activity against them than triadimefon. All of them showed moderate or weak antibacterial activity towards Staphylococcus aureus and Escherichia coli with O6 and O78 serotypes except that 3 was inactive to E. coli O6.


Subject(s)
Anti-Bacterial Agents/pharmacology , Antifungal Agents/chemistry , Ascomycota , Escherichia coli , Microbial Sensitivity Tests , Molecular Structure , Phenyl Ethers/chemistry
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