Lucyoside Q,a Triterpenoid Saponin from Leaves of Luffa cylindrica(L.)M.Roem.

从丝瓜（Ｌｕｆｆａｃｙｌｉｎｄｒｉｃａ（Ｌ．）Ｍ．Ｒｏｅｍ．）叶中分得一种新的五环三萜皂苷和芹菜素，用光谱学和化学方法确定该皂苷的结构为２１β羟基齐墩果酸２８ＯβＤ吡喃葡萄糖苷，命名为丝瓜皂苷Ｑ。

A new pentacyclic triterpenoid saponin, named lucyoside Q, was isolated from the leaves of Luffa cylindrica. Its structure was established as 21 β hydroxyloleanolic acid 28 O β D glucopyranoside by means of the spectral evidence and chemical methods.