ABSTRACT
Nine compounds were isolated from 95% ethanol extract of the roots of Tagates erecta by silica gel column chromatography and Sephadex LH-20 chromatography. Their structures were identified by spectroscopic data as 5-hydroxymethylfurfuryl methyl succinate (1), 5,7,3'-trihydroxyl-3,6,4'-trimethoxylflavone (2), syringic acid (3), 5,7,4'-trihydroxyl-3,6-trimethoxylflavone (4), patuletin-4'-methoxyl-7-O-β-D-glucopyranoside (5), patulitrin (6), 5,3'-dihydroxyl-3,6,4'-trimethoxylflavone-7-O-β-D-glucopyranoside (7), (2,2'-biththiophen)-5-ol (8), and 3-hydroxyl-4-methoxyl benzoic acid (9). Among them, compound 1 is a new disubstituted succinate and compound 8 was isolated from a natural resource for the first time. Compounds 2, 4, 5 and 9 were isolated from this genus for the first time. By measuring the biological activity and virulence of different compounds against soybean cyst nematode, it has found that compounds 1-8 exhibited a toxic effect on soybean cyst nematode, and ED50 values indicate that compounds 3 and 7 are the most potent, with ED50 values of 0.008 μg·mL-1.
ABSTRACT
Ten triterpenes compounds were isolated from the methanol extraction of the latex of Euphorbia resinifera by means of various chromatographic methods such as silica gel, ODS and semi-preparative HPLC, Their structures were identified by spectroscopic methods and physicochemical properties. These isolated compounds were identified as 3-hydroxy-25,26,27-trinor eupha-8-ene-24-oate (1), iso-maticadienediol (2), 25,26,27-trinorTirucall-8-ene-3-ol-4-acid (3), dammarendiol Ⅱ (4), eupha-8,24-diene-3-ol-26-al (5), lnonotusane C (6), eupha-8,24-diene-3-ol-7,11-dione (7), inoterpene A (8), inoterpene B (9), and eupha-24-methylene-8-ene-3-ol-7,11-dione (10). Among them, compound 1 was a new natural product, compounds 2-4 were firstly isolated from the Euphorbiaceae and compounds 5 and 6 were isolated from the genus Euphorbia for the first time. The cytotoxicity of the compounds 1-10 against MCF-7, U937 and C6 cancer cell lines was evaluated, but none of the compounds was active.
ABSTRACT
The theory of medicinal properties of traditional Chinese medicine (TCM) is one of the core theories of TCM, which is an important basis for guiding the clinical application of TCM and the key supporting point for the modernization of TCM. How to study the modernization of TCM under the guidance of traditional Chinese medicine theory has become a great challenge for modern researchers. Currently, the researches in TCM mainly focus on chemical studies such as on active ingredients and effective components, lacking the guidance of traditional Chinese medicine theory, and losing the inherent characteristics of TCM. Therefore, the combination of the theory of TCM and the modernization of TCM and the establishment of research mode that is in line with the characteristics of modernization of traditional Chinese medicine under guidance by the theory of medicinal properties of TCM shall be the top priority in modern Chinese medicine research. The property and flavor of TCM are closely related to its chemical compositions, and also have certain regularity. The researches on the chemical components of TCM, systematic design of property and flavor, as well as the separation and combination of TCM property and flavor are beneficial to the overall analysis of the characteristics of TCM, showing great significance to inherit and carry forward TCM. The pharmacological effects about separation and combination methods based on TCM property and flavor were reviewed in this study, providing theoretical reference for the development of new drugs and the application of TCM.
ABSTRACT
The combined administration of traditional Chinese medicine (TCM) aims at comprehensive adjustment of body based on the theory of TCM and the theory of Chinese medicine property. The natures and tastes of TCM are the core of the theory of TCM property. The combined administration of natures and tastes of TCM is one of the important theories of prescription compatibility. The objective of study on the combined administration of natures and tastes of prescriptions according to symptoms of disease is to clarify the compatibility mechanism of prescriptions. The study on the compound compatibility of TCM under the guidance of theory of TCM focuses on the relationship between the composition, dosage and compatibility of TCM by using modern high-tech means. It demonstrates the effective combination of TCM theory and modern technology, and the inheritance and innovation of TCM theory. The study of the effect and mechanism of compatibility of natures and tastes of TCM under the guidance of TCM theory is helpful for the analysis of the compatibility effect and mechanism of TCM based on the pharmacological effect of natures and tastes of TCM. The correlation between the pharmacological effect of natures and tastes of TCM and the pharmacological effect of components were studied by modern informatics, which is beneficial to promote the development of theory of TCM compound. The study of the compatibility between natures, tastes and component of TCM shall pay attention to the combination of pharmacological effects of natures, tastes and component of TCM, so as to define the scientific connotation of the compatibility of TCM, and make full use of the characteristics and advantages of TCM. The methods and pharmacological effects of the combined administration of TCM compounds are reviewed to provide the theoretical basis for the development of new drugs and clinical application.
ABSTRACT
OBJECTIVE: To isolate the chemical constituents from Caulophyllum robustum and confirm their chemical structures. METHODS: The chemical constituents were isolated by MCI gel, repeated silica gel chromatography, preparative liquid chromatography.and their structures were elucidated by NMR and MS etc. RESULTS: The structures of compounds 1-10 were identified as echinocystic acid (1), oleanolic acid-3-O-β-D-glucopyranosyl-(1→2)-α-L-arabinopyranoside (2), hederagenin-3-O-β-D-glucopyranosyl-(1→3)-α-L-arabinopyranoside (3), hederagenin-3-O-β-D-glucopyranosyl-(1→2) [β-D-glucopyranosyl-(1→3)]-α-L-arabinopyranoside (4), 3-O-β-D-glucopyranosyl-(1→2)-α-L-arabinopyranosyl echinocystic acid-28-O-α-L-rhamnopyranosyl-(1→4)-β-D-glucopyranosyl-(1→6)-β-D-glucopyranosyl ester (5), 3-O-α-L-arabinopyranosyl hederagenin-28-O-(4-O-acetyl)-α-L-rhamnopyranosyl-(1→4)-β-D-glucopyranosyl-(1→6)-β-D-glucopyranosyl ester (6), (6R, 7E, 9R)-9-hydroxy-4, 7-megastigmadien-3-one-9-O-β-D-glucoside (7), (9R)-9-hydroxy-4, 6-megastigmadien-3-one-9-O-β-D-glucoside (8), maltose (9), and sucrose (10). CONCLUSION: Compounds 1-10 are firstly isolated from the genus Caulophyllum except 5.
ABSTRACT
Objective: To separate the saponins from the roots and rhizomes of Caulophyllum robustum and determine their chemical structures. Methods: The chemical constituents were isolated by repeated silica gel chromatography, medium pressure column chromatography, and semi-preparative liquid chromatography. Their structures were elucidated by the data of NMR and MS. Results: Ten compounds were isolated from the roots and rhizomes of C. robustum and the structures of compounds 1-10 were identified as echinocystic acid-3-O-β-D-glucopyranosyl-(1→2)-α-L-arabinopyranoside (1), 3-O-α-L-arabinopyranosylhederagenin-28-O-β-D- glucopyranosyl-(1→6)-β-D-glucopyranoside (2), HN-saponin H (3), ciwujianosides A1 (4), glycoside L-K1 (5), 3-O-β-D- glucopyranosyl-(1→3)-α-L-arabinopyranosyl-hederagenin-28-O-α-L-rhamnopyranosyl-(1→4)-β-D-glucopyranosyl-(1→6)-β-D-gluco-pyranoside (6), leonticin F (7), 3-O-β-D-glucopyranosyl-(1→3) [β-D-glucopyranosyl-(1→2)] α-L-arabinopyranosyl-echinocystic acid-28-O-α-L-rhamnopyranosyl-(1→4)-β-D-glucopyranosyl-(1→6)-β-D-glucopyranoside (8), leonticin A (9), and morroniside (10). Conclusion: Compound 10 is a iridoid. Compounds 1 and 10 are firstly isolated from the plants of Caulophyllum Maxim., compouds 2-9 are isolated from this plant for the first time.