RESUMEN

Four triterpenoids were isolated and purified from the 95% ethanol extract of Maytenus guangxiensis by silica gel column chromatography, Sephadex LH-20 column chromatography, MCI column chromatography and preparative RP-HPLC. Their structures were determined from their physicochemical properties and spectral data. They were identified as maytguanone A (1), maytguanone B (2), 11α-methoxyurs-12-ene-1β,3β-diol (3), lup-20(29)-ene-3β,11α-diol (4). Compounds 1 and 2 are new triterpenoids, along with compounds 3 and 4 were isolated from M. guangxiensis for the first time. The cytotoxicity of compounds 1, 3 and 4 was evaluated using the MTT procedure with three cancer cell lines. The results show that compound 3 displayed good inhibitory effects against HeLa, with an IC50 of 10.68 μmol·L-1.

RESUMEN

Four cadinane-type sesquiterpenes were obtained from the petroleum ether of 95% ethanol extract of Eupatorium adenophorum Spreng by using an HP-20 macroporous resin column, silica gel, and semi-preparative HPLC. Their structures were determined by physical, chemical and spectroscopic methods and identified as eupatorinol (1), (+)-(5R,7S,9R,10S)-2-oxocadinan-3,6(11)-dien-12,7-olide (2), (1S,4R)-7-hydroxycalamenen-3-one(3) and (-)-(5R,6R,7S,9R,10S)-cadinan-3-ene-6,7-diol (4). Among them, compound 1 is a new cadinane-type sesquiterpene, and compound 3 was isolated from this genus for the first time. In bioassay, none of these compounds displayed obvious cytotoxicity.

RESUMEN

This study was designed to investigate triterpenoids from the roots of Rosa laevigata Michx. The silica gel column chromatography was used to separate the chemical constituents from the roots of Rosa laevigata Michx. HPLC was used to analyze its purity and chemical constitution. Spectroscopy methods were used to determine their structures. Five constituents were isolated and identified as19α-OH-3β-E-feruloyl corosolic acid (1), 23-hydroxy-tormentic acid (2), 2α, 3β, 19α, 23-tetrahydroxy-12-en-28-oleanolic acid (3), 2α, 3α, 20β-trihydroxyurs-13 (18)-en-28-oic-acid (4), 2α, 3β, 20β-trihydroxyurs-13 (18)-en-28-oic-acid (5). Compound 1 was assigned as a new compound, compounds 4, 5 were obtained from the genus Rosa for the first time.

RESUMEN

To study the triterpenoids from the roots of Rosa laevigata. The silica gel column chromatography was used to separate the chemical constituents from the roots of Rosa laevigata Michx. HPLC was used to analyze its purity, chemical and spectroscopy methods were used to determine their structures. 12 constituents were isolated and identified as(2R, 19R)methyl 2-acetyloxy-19- hydroxyl-3-oxo-urs-12-en-28-carboxylate(1), pomonic acid (2), 18, 19-seco, 2α, 3α-dihydroxy-19-oxo-urs-11, 13(18)-dien-28-oic acid(3), swinhoeic acid (4), myrianthic acid(5), 2α, 3β, 19α-trihydroxy-24-oxo-urs-12-en-oic acid (6), tormentic acid(7), arjunic acid (8), 1β-hydroxyeuscaphic acid(9), quadranoside Ⅷ (10), alpinoside(11), rubuside B (12). Compounds 1-4, 6, 9, 11-12 were obtained from this plant for the first time. Compounds 2-4, 6, 11-12 were obtained from the genus Rosa for the first time.

RESUMEN

Fifteen cassaen-type diterpenes were isolated from the 95% ethanolic extract of the seeds of C. minax through various chromatographic techniques. Their structures were identified on the basis of spectroscopic data as pulcherralpin (1), caesalpinin ML (2), chamaetexane C (3), chamaetexane D (4), 6β, 18-diacetoxycassan-13, 15-diene (5), neocaesalpin K (6), neocaesalpin MP (7), neocaesalpin M (8), neocaesalpin Q (9), neocaesalpin P (10), neocaesalpin R (11), caesaldekarin D (12), caesaldekarin A (13), caesaldekarin b (14), 3β,6α-diacetoxyvouacapane (15). Among them, compounds 14, 9-11 were isolated from this plant for the first time.

Asunto(s)

RESUMEN

The constituents in 95% ethanol extract of the root of Rosa cymosa Tratt were purified by column chromatography techniques, leading to isolation of eleven triterpenes. Their structures were elucidated by spectroscopic data as pomolic acid (1), fupenzic acid (2), ursolic acid (3), euscaphic acid (4), arjunic acid (5), tomentic acid (6), 3β-E-feruloyl corosolic acid (7), 1β-hydroxyeuscaphic acid (8), myrianthic acid (9), cecropiacic acid (10), and ilexoside B (11). Among them, compounds 3, 6-8, 10 and 11 were obtained from this plant for the first time, and compounds 7 and 10 were obtained from this genus for the first time.

Asunto(s)

RESUMEN

<p><b>OBJECTIVE</b>To study antibacterial chemical constituents of Sarcandra glabra.</p><p><b>METHOD</b>The constituents of the chloroform and EtOAc-soluble portions of the EtOH extract from the whole plant of S. glabra, which posses the antibacterial activities, were isolated and purified with column chromatography. The compounds were identified by physical and spectroscopic techniques.</p><p><b>RESULT</b>Six compounds were isolated and identified as 4, 4'-biisofraxidin (1), esculetin (2), fraxetin (3), scoparone (4), isofraxidin (5), scopoletin(6), respectively.</p><p><b>CONCLUSION</b>Compound 1 is a novel natural product. Compounds 24 were isolated from the plants of Chloranthaceae for the first time. The antibacterial activities of these six compounds were tested for the first time. Some compounds may have potential for future study and development as plant-derived oral antibacterial agents.</p>

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