番红花化学成分研究——Ⅲ.番红花花粉中的番红花新苷甲和乙的结构

Studies on the Constituents of Crocus sativus——Ⅲ.The Structural Elucidation of Two New Glycosides of Pollen

从番红花(crocus sativus L.)花粉中分到两个新苷,命名为番红花新苷甲(1)和乙(2).经理化性质和对它们的 IR、UV、~1HNMR、^(13)C NMR 和 MS 数据的分析,鉴定1为异鼠李素-4′-O-α-L-鼠李吡喃糖(1→2)β-D-葡萄吡喃糖苷,2为β-对羟基苯基-乙醇-α-O-α-L-鼠李吡喃糖(1→2)-β-D 葡萄吡喃糖苷.

Two new glycosides have been isolated from the pollen of Crocus sativus L..Theirstructures were elucidated as isorhamnetin-4'-O-α-L-rhamnopyranosyl(1→2)-β-D-glucopyranoside (crosatoside A) and β-(p-hydroxyphenyl) ethanol-α-O-L-rham-nopyranosyl(1→2)-β-D-glucopyranoside (crosatoside B),the third compound is theknown,kaempferol-3-O-β-D-glucopyranosyl (1→2)-β-D-glucopyranoside by means ofchemical and spectroscopic analysis.