Dracaenoside A and B, New C-22 Steroidal Lactone Glycosides from the Stem of Dracaena cochinchinensis

编号 zgly0000315254

文献类型 期刊论文

文献题名 Dracaenoside A and B, New C-22 Steroidal Lactone Glycosides from the Stem of Dracaena cochinchinensis

作者 QingAnZHENG  ChongRenYANG 

作者单位 StateKeyLaboratoryofPhytochemistryandPlantResourcesinWestChina 

母体文献 Chinese Chemical Letters;中国化学快报: 英文版 

年卷期 2003,14(12)

页码 1261-1264

年份 2003 

分类号 R284.2  R282.71 

关键词 C-22甾族内酯配糖  茎  剑叶龙血树  龙血树配糖A  龙血树配糖B  龙舌兰科  中药  植物药 

文摘内容 Two new C-22 steroidal lactone glycosides, named dracaenoside A and B were isolated from the methanol extract of the fresh stem of Dracaena cochinchinensis. Their structures were established as (20S)3β,14α,16β-trihydroxy pregn-5-ene-22-carboxylic acid (22,16)-lactone 3-O-α-L-rhamnopyranosyl (1→2)[ α-L-rhamnopyranosyl (l→4)]-β-D-glucopyranoside and (20S)3β, 14α,16β-trihydroxy pregn-5-ene-22-carboxylic acid (22,16)-lactone 3-O-α-L-rhamnopyranosyl (1→2)[β-D-glucopyranosyl(1→3)]-β-D-glucopyranoside by means of 2D NMR spectral and chemical methods. It is the first time that steroidal lactone glycosides were isolated from the genus Dracaena。