- 期刊
龍眼花化學成份之研究
Studies on the Chemical Constituents of Euphoria Longana
摘要
龍眼花的正己烷萃取物，在柱形層析中，先以正己烷溶洗後，再以氯仿溶洗，此二種溶洗液蒸乾後，分別待到一白色之晶體，從正己烷中得到之晶體，熔點為122~136°C，從氯仿中得到之晶體，熔點為126-139°C，類固醇試驗(Liberman Buchard)為陽性反應。由氣相層析一質譜儀之分離，得知二者均為兩種固醇之混合物。此二種固醇之分子式皆為C_(29)H_(48)O，其一為豆固醇(stigonasterol)，熔防170°C，另一為黑藻固醇(fucosterol)，熔點124°C。在正已烷分出之固醇中，黑藻固醇與豆固醇之比為60%：40%。在氯仿中若為58%：42%。上述二者由GC-MS之光譜得到證明。
關鍵字
無資料並列摘要
Euphoria Longana is a very common plant in south Taiwan. It's flowers have the effect of treating leucohrrea^1. The components of the flowers have not investigated before. Now the flowers are extracted with n-hexane, then seperated by column chromatography. A mixture of stigmasterol and fucosterol is obtained from the n-hexane eluent and chloroform eluent respectively. Both sterols have the same molecular formula C_(29)H_(48)O, and a close melting point (for stigmasterol is 170°C and fucosterol is 124°C). They differ only in the position of double bond in C_(17) side chain. They are identified by GC-MS spectrum. The ratio of stigmasterol to fucosterol is calculated by HP intergrator. The ratio is 40%: 60% in n-hexane eluent, and 42% : 58% in chloroform eluent.