Pregnane glycosides from Dracaena cochinchinensis.
Two new pregnane glycosides, named dracaenoside C and D, were isolated from the fresh stems of Dracaena cochinchinensis. Their structures were established as 3beta,14alpha-dihydroxypregna-5,16(17)-diene-20-one 3-O-alpha-L-rhamnopyranosyl(1 --> 2)[alpha-L-rhamnopyranosyl(1 --> 4)]-beta-D-glucopyranoside (1) and 3beta,14alpha-dihydroxypregna-5,16(17)-diene-20-one 3-O-alpha-L-rhamnopyranosyl(1 --> 2)[beta-D-glucopyranosyl(1 --> 3)]-beta-D-glucopyranoside (2) by means of 2D NMR spectral and chemical methods.
Zheng
Qing-An
QA
State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming 650204, Yunnan, China.
Yang
Chong-Ren
CR
D031409:Dracaena; D004365:Drugs, Chinese Herbal / Q000737:chemistry*; D006027:Glycosides / Q000737:chemistry*; D006801:Humans; D009682:Magnetic Resonance Spectroscopy; D008517:Phytotherapy; D018547:Plant Stems; D011278:Pregnanes / Q000737:chemistry*
D004365:Drugs, Chinese Herbal; D006027:Glycosides; D011278:Pregnanes