Phenolic derivatives from root bark of Schisandra sphenanthera / 中国中药杂志

This paper aimed to study the chemical constituents from the root bark of Schisandra sphenanthera. Silica, Sephadex LH-20 and RP-HPLC were used to separate and purify the 80% ethanol extract of S. sphenanthera. Eleven compounds were identified by ~1H-NMR, ~(13)C-NMR, ESI-MS, etc., which were 2-[2-hydroxy-5-(3-hydroxypropyl)-3-methoxyphenyl]-propane-1,3-diol(1), threo-7-methoxyguaiacylglycerol(2),4-O-(2-hydroxy-1-hydroxymethylethyl)-dihydroconiferylalcohol(3), morusin(4), sanggenol A(5), sanggenon I(6), sanggenon N(7), leachianone G(8),(+)-catechin(9), epicatechin(10), and 7,4'-dimethoxyisoflavone(11). Among them, compound 1 was a new compound, and compounds 2-9 were isolated from S. sphenanthera for the first time. Compounds 2-11 were subjected to cell viability assay, and the results revealed that compounds 4 and 5 had potential cytotoxicity, and compound 4 also had potential antiviral activity.

Five new polyhydroxylated furostanol saponins from the rhizomes of Tupistra chinensis / 中国天然药物

Five new polyhydroxylated furostanol saponins were isolated from the roots and rhizomes of Tupistra chinensis, and their structures were determined as tupistrosides J-N (1-5), together with four known furostanol saponins (6-9), on the basis of physico-chemical properties and spectral analysis. Among them, compounds 3 and 5 showed cytotoxicity against human cancer cell lines SW620 with IC values of 72.5 ± 2.4 and 77.3 ± 2.5 μmol·L, respectively. Compound 4 showed cytotoxicity against human cancer cell line HepG2 with IC value of 88.6 ± 2.1 μmol·L.

Steroidal constituents from Helleborus thibetanus and their cytotoxicities / 中国天然药物

Thibetanosides E-H (1-4), four new steroidal constituents including three rare sulfonates (2-4), were isolated from the roots and rhizomes of Helleborus thibetanus, together with nine known steroidal compounds (5-13). Their structures were elucidated by detailed spectroscopic analysis, including 1D and 2D NMR techniques and chemical evidence. In this study, compounds 2-13 were evaluated for their cytotoxic activities against HCT116, A549 and HepG2 tumor cell lines in vitro. Among them, compound 8 (thibetanoside C) showed cytotoxicities against A549 cells(IC 39.6 ± 1.9 μmol·L) and HepG2 cells(IC 41.5 ± 1.1 μmol·L), respectively. Compound 9 (23S, 24S)-24-[(O-β-D-fucopyranosyl)oxy]-3β, 23-dihydroxy-spirosta-5, 25(27)-diene-1β-ylO-(4-O-acetyl- α-L-rhamnopyranosyl)-(1→2)-O-[β-D-xylopyranosyl-(1→3)]-α-L-arabinopyranoside) showed cytotoxicity against HCT116 cells(IC 33.6 ± 2.1 μmol·L).

Chemical constituents of Jasminum giraldii and their antioxidant activity / 中国中药杂志

Ten compounds were isolated from the barks of Jasminum giraldii by means of various of chromatographic techniques such as silica gel, Sephadex LH-20 and Rp-HPLC. Their structures were identified by spectroscopic data analysis as (+)-medioresinol (1), (+) -syringaresinol (2), syringaresinol-4'-O-beta-D-glucopyranoside (3), oleanic acid (4), 3-methoxy-4-hydroxy-trans-cinnamaldehyde (5), trans-sinapaldehyde (6), syringaldehyde (7), 1-(4-methoxy -phenyl) -ethanol (8), trans-cinnamic acid (9), and 4-(1-methoxyethyl) -phenol (10). Among them, compounds 1-3, 5-8 and 10 were isolated from the J. genus for the first time and compounds 4 and 9 were obtained from J. giraldii for the first time. In the DPPH free radical scavenging assay, compound 1 exhibited significant activity (IC50 55.1 micromol x L(-1)), compared with vitamin C(IC50 59.9 micromol x L(-1)); and compound 2 showed moderate activity (IC50 79.0 micromol x L(-1)), compared with 2, 6-di-tert-butyl4-methylphenol (IC50 236 micromol x L(-1)).

Chemical constituents of leaf of Eucommia ulmoides / 中国中药杂志

Ten compounds were isolated from the leaf of Eucommia ulmoides by means of recrystallization and chromatographic techniques such as D-101 macroporous resin, MCI resin, ODS gel, Sephadex LH-20 and Rp-HPLC. Their structures were identified by NMR spectral analyses as kaempferide 3-O-beta-D-glucoside (1), quercetin-3-O-beta-D-glucoside (2), quercetin (3), quercetin-3-O-beta-D-xylosyl-(1-->2)-beta-D-galactoside (4), kaempferol-3-O-alpha-L-rhamnosyl-(1-->6)-beta-D-glucoside (5), (2S,3S)-taxifolin 3-O-beta-D-glucoside (6) ,4-hydroxy cinnamic acid (7), (+)-cycloolivil (8), pinoresinol beta-D-glucoside (9), squalene (10). Among them compounds 1,5-7,10 were isolated from the Eucommia genus for the first time. In the DPPH free radical scavenging assay, compound 2 exhibited significant activity (IC50 13.7 micromol x L(-1)), compared with vitamin C (IC50 59.9 micromol x L(-1)); compounds 1, 3 and 9 showed moderate activity (IC50 161,137, 214 micromol x L(-1)), compared with 2,6-di-tert-butyl-4-methylphenol (IC50 236 micromol x L(-1)); compound 4 and 6 showed weak activity (IC50 264, 299 micromol x L(-1)).

Chemical constituents of leaves of Panax japonicus var. major / 中国中药杂志

Seven compounds were isolated from the leaves of Panax japonicus var. major by chromatographic methods including silica gel, Sephadex LH-20, ODS and semi-preparative HPLC. Their structures were elucidated by their physical and chemical properties and spectral data analysis as 5, 7-dihydroxy-8-methoxyl flavone (1), ginsenoside Rs2 (2), quinquenoside R1 (3), ginsenoside Rs1 (4), notoginsenoside Fe (5), ginsenoside Rd2 (6) and gypenosiden IX (7). Among them, compound 1 was obtained from the Panax genus for the first time, and compounds 2-7 were isolated from this plant for the first time.

Analysis on chemical components from water extract of paeoniae radix alba by high performance liquid chromatography-electrospray ionization-quadrupole-time of flight-mass spectrometry / 中国中药杂志

This experiment was performed to establish a qualitative analysis on chemical composition in water extract of Paeoniae Radix Alba by HPLC-ESI-Q-TOF-MS. The analysis was conducted on a C18 (Hanbon Lichrospher, 4.6 mm x 250 mm, 5 microm) column with methanol-0.1% formic acid as the mobile phase for gradient elution; ESI ion source was used for mass spectra, and data were collected in both positive and negative modes. The results showed that eleven compounds from water extract of Paeoniae Radix Alba had been identified by analyzing positive and negative ion mass data including element composition and by comparing with data from literatures. Since efficient separation of HPLC and the high sensitive detection of MS was used, this experiment, it will provide evidences for elucidation of the effective substance in the water extract of Paeoniae Radix Alba.

Determination of loniceroside A and C in Lonicerae japonicae by RP-HPLC / 中国中药杂志

<p><b>OBJECTIVE</b>To develop an HPLC method for determination of loniceroside A and loniceroside C in Lonicerae japonicae.</p><p><b>METHOD</b>The analysis was carried out on an Alltech C18 column (4.6 mm x 250 mm, 5 microm) evaluated with methanol-acetonitrile-0.1% glacial acetic acid as mobile phase. Flow rate was at 1.0 mL x min(-1) and the detection wavelength was at 210 nm for UV detection.</p><p><b>RESULT</b>The calibration curves were linear over the range from 0.15 to 2.25 microg (r = 0.999 9) for loniceroside A and 0.11 to 1.65 microg (r = 0.999 1) for loniceroside C. The average recoveries were 99.9% and 98.3%, respectively.</p><p><b>CONCLUSION</b>The contents of Loniceroside A&C are diverse in Flos Lonicerae japonicae in different regions.</p>