白穗花的甾体皂甙

Steroidal Saponins from Speirantha gardenii (Liliaceae)

从中国特有植物白穗花（Speiranthagardenii（Hook．）Baill．）根茎中分离得到两个新的甾体皂甙。经化学和光谱方法鉴定其化学结构分别为22－甲氧基－（25R）－5β－呋喃甾烷－1β，3β，4β，5β，26-五羟基26－O-β-D-吡喃葡萄糖甙（Ⅰ）和22-甲氧基-（25R）－5β-呋喃甾烷-1β，2β，3β，4β，5β，26-六羟基26－O－β-D-吡喃葡萄糖甙（Ⅱ）。

Two new steroidal saponins were isolated from the rhizome of the Chinese native plant, Speirantha gardenii (Hook. ) Baill. Their structures were established as 22- methoxy- (25 R ) -5β- furostane- 15, 3β,4β, 5β, 26-pentaol 26- O-β- D- glucopyranside (I ) and 22- methoxy- (25 R ) - 5β- furostane- 1β, 2β,3β,4β,5β, 26- hexaol 26- O - β - D- glucopyranoside (Ⅱ) on the basis of chemical and spectral evidences.