Phytochemical examination of the tubers of Dichelostemma multiflorum led to the isolation of three new steroidal saponins together with two known saponins. The structures of the new compounds were determined by spectral data and a few chemical transformations to be (25R)-5 alpha-spirostane- 1 beta,3 beta-diol (brisbagenin) 1-O-[O-alpha-L-rhamnopyranosyl-(1-->3)-4-O- acetyl-alpha-L-arabinopyranoside]
对多花草的块茎进行植物
化学检查,分离出三种新的甾体
皂苷和两种已知的
皂苷。新化合物的结构由光谱数据和一些
化学转化确定为 (25R)-5 α-螺甾烷- 1 β,3 β
-二醇 (brisbagenin) 1-O-[O-α-L-rhamnopyranosyl- (1-->3)-4-O-乙酰-α-L-阿拉伯
吡喃糖苷],brisgabenin 1-O-[O-α-
L-鼠李糖基-(1-->2)-O-[α-
L-鼠李糖基-(1-->3)]-4-O-乙酰-α-L-阿拉伯
吡喃糖苷e]和(22S,25S)-5 α-spirostan-3β-o1 3-O-[O-β-D -
吡喃半
乳糖基-(1-->2)-O-[β-
D-吡喃木糖基-(1-->3)]-O-β-
D-吡喃葡萄糖基-(1-->4)-β-D-
吡喃半
乳糖苷]。已知化合物被鉴定为 desglucolanatigonin II 和 gitonin,具有一定数量的相应 C-25S