Two new C steroidal glycosides isolated from Cynanchum komarovii / 中国天然药物

The present study was designed to further investigate the C steroidal glycosides in Cynanchum plants. Two new steroidal glycosides based on a 13, 14:14, 15-disecopregnane-type aglycone, komaroside P (1) and komaroside Q (2), together with three known compounds (3-5) were isolated from the whole herbs of Cynanchum komarovii. The aglycones of compounds 1 and 2 were two new disecopregnane. Their structures were elucidated on the basis of 1D, 2D NMR spectroscopic data and acid hydrolysis. All the compounds (1-5) showed potent inhibitory activities against human leukemia cell lines (HL-60) with IC values ranging from 16.6 to 26.3 μmol·L, compared to the positive control 5-fluorouracil (6.4 μmol·L).

Two new C steroidal glycosides isolated from Cynanchum komarovii / 中国天然药物

The present study was designed to further investigate the C steroidal glycosides in Cynanchum plants. Two new steroidal glycosides based on a 13, 14:14, 15-disecopregnane-type aglycone, komaroside P (1) and komaroside Q (2), together with three known compounds (3-5) were isolated from the whole herbs of Cynanchum komarovii. The aglycones of compounds 1 and 2 were two new disecopregnane. Their structures were elucidated on the basis of 1D, 2D NMR spectroscopic data and acid hydrolysis. All the compounds (1-5) showed potent inhibitory activities against human leukemia cell lines (HL-60) with IC values ranging from 16.6 to 26.3 μmol·L, compared to the positive control 5-fluorouracil (6.4 μmol·L).

Two new phenolic glycosides isolated from the fruits of Citrus aurantium / 中国天然药物

The present study was designed to investigate the chemical constituents of the fruit of Citrus aurantium L.. The compounds were isolated and purified by various chromatographic techniques, and their structures were elucidated on the basis of physicochemical properties and spectral data. Two new phenolic glycosides (compounds 1 and 2) were obtained and identified as 1-O-3, 5-dihydroxyphenyl-(6-O-4-hydroxybenzoyl)-β-D-glucopyranoside (1) and 1-O-3, 5-dihydroxyphenyl-(6-O-3-methoxy-4-hydroxy benzoyl)-β-D-glucopyranoside (2), respectively.

Identification of antioxidant activity of two new aromatic ring butyrolactone derivatives from Dictamnus dasycarpus Turcz / 中国天然药物

The present study carried out a phytochemical investigation on the root barks of Dictamnus dasycarpus Turcz, leading to the isolation and characterization of two new aromatic ring butyrolactone derivatives, dasycarpusphenol acid A (1) and dasycarpusphenol acid B (2). Their structures were elucidated by using spectroscopic techniques and HR-FAB-MS. Compounds 1 and 2 exhibited antioxidant activity, with their IC values being 28.95 and 41.76 mg·mL, respectively.

Studies on chemical constituents from leaves of Lysidice brevicalyx / 中国中药杂志

<p><b>OBJECTIVE</b>To study the chemical constituents of Lysidice brevicalyx.</p><p><b>METHOD</b>Various chromatographic techniques were used to isolate and purify the constituents such as column chromatography on silica gel, Rp-silica gel, Sephadex LH-20 and HPLC. The structures were elucidated by chemical evidence and spectroscopic methods.</p><p><b>RESULT</b>Seven compounds were isolated from the 95% ethanol extract of the leaves of L. brevicalyx and these compounds were elucidated as 2-0-[1-(3-methylbutyryl)phloroglucin-ol]-beta-D-glucopynanoside (1), 3-beta-D-glucopyranosyloxy-4, 5-dimethoxy-benzoic acid (2), benzyl alcohol O-beta-D-glucopyra noside (3), polydatin (4), quercetin-3-alpha-L-rhamnopyranoside (5), ethyl gallate (6), benzyl 6-O-alpha-L-arabinofurano syl-beta-D-glucopynanoside (7).</p><p><b>CONCLUSION</b>All Compounds were isolated from this plant for the first time. Compounds 2, 3, 5-7 were obtained from this genus for the first time.</p>

Studies on flavonoids from Blumea riparia / 中国中药杂志

<p><b>OBJECTIVE</b>To separate and identify the chemical constituents of Blumea riparia.</p><p><b>METHOD</b>The compounds were separated and purified by repeated silica gel, Sephadex LH -20 column chromatographiy. The structures of these compounds isolated were identified by analysis of their spectral data, physical and chemical properties.</p><p><b>RESULT</b>Six flavonoids were isolated from B. riparia. and their structures were identified as eriodictyol-7, 4'-dimethyl ether (1), eriodictyol-7, 3'-dimethyl ether (2), eriodictyol-7-methyl ether (3), quercetin-7, 3', 4'-trimethyl ether (4), tamarixetin (5), rhamnocitrin (6).</p><p><b>CONCLUSION</b>Compound 1-6 were obtained from B. riparia for the first time.</p>

Studies on chemical constituents from stems and leaves of Adenanthera pavanina / 中国中药杂志

<p><b>OBJECTIVE</b>To study the chemical constituents of Adenanthera pavanina.</p><p><b>METHOD</b>Various chromatographic techniques were used to isolate and purify the constituents. The structures were elucidated by chemical evidence and spectroscopic methods.</p><p><b>RESULT</b>Nine compounds were isolated from the 95% ethanol extract of the stems and leaves of A. pavanina and their structures were elucidated as aridanin (1), 3-[(2-Acetamido-2-deoxy-beta-D-glucopyranosyl)oxy]-16alpha-hydroxyolean-12-en-28-oic acid (2), (+)-pinitol (3), sucrose (4), (-)-butin (5), apigenin (6), isoliquiritigenin 4-methyl ether (7), oleanolic acid (8), daucosterol (9).</p><p><b>CONCLUSION</b>Compounds 1-7 were isolated from this plant for the first time.</p>

Saponins of polygalacic acid type from Platycodon grandiflorum / 药学学报

<p><b>AIM</b>To isolate triterpene saponins of polygalacic acid type from the roots of Platycodon grandiflorum (Jacq.) A. DC and to identify their structures.</p><p><b>METHODS</b>The compounds were separated by means of extraction, chromatography on silica gel, MPLC and HPLC, and their structures were elucidated on the basis of spectral analyses (FAB-MS, IR, 1H NMR, 13C NMR etc.).</p><p><b>RESULTS</b>Three triterpene saponins were isolated from the roots of Platycodon grandiflorum. They were identified as 3-O-beta-D-laminaribiosyl polygalacic acid (I), 3-O-beta-D-glucopyranosyl polygalacic acid (II), polygalacin D (III), separately.</p><p><b>CONCLUSION</b>Compound I is a new compound, compounds II, III are known triterpene saponins. The compound I and II were isolated from the plant for the first time, which is also the monodesmoside from the plant for the first time.</p>

Chemical constituents of the aerial parts of Rhamnus crenatus / 药学学报

<p><b>AIM</b>To study chemical constituents of the aerial parts of Rhamnus crenatus sieb. et zucc.</p><p><b>METHODS</b>The chemical constituents were isolated by chromatographic methods and their structures were elucidated on the basis of spectral analysis.</p><p><b>RESULTS</b>Five compounds were isolated and their structures were identified as crenatoside (1), torachrysone (2), emodin (3), emodin-1-O-beta-D-glucopyranoside (4) and beta-sitosterol (5) respectively.</p><p><b>CONCLUSION</b>Compound 1 is a new compound and the others were isolated from Rhamnus crenatus for the first time.</p>