Megastigmane, Benzyl and Phenethyl Alcohol Glycosides, and 4,4'-Dimethoxy-.BETA.-truxinic Acid Catalpol Diester from the Leaves of Premna subscandens MERR.
作者:Hirokazu SUDO、Toshinori IDE、Hideaki OTSUKA、Eiji HIRATA、Anki TAKUSHI、Takakazu SHINZATO、Yoshio TAKEDA
DOI:10.1248/cpb.48.542
日期:——
Extensive isolation work on the n-BuOH-soluble fraction obtained from the leaves of Premna subscandens, collected on Ishigaki island, Okinawa, afforded six compounds. Two were identified as megastigmane glucosides, 7-(3,5-dihydroxy-1,1,5-trimethylcyclohexylidene)-9-methylprop++ +-8-enyl 9-O-beta-D-glucopyranoside and 3-hydroxy-5,6-epoxy-beta-ionol 9-O-beta-D-glucopyranoside. The structures of the remaining
对从冲绳县石垣岛收集的Premna subscandens叶子获得的n-BuOH可溶级分进行广泛的分离工作,得到了六种化合物。两种被鉴定为大麦角菌素葡萄糖苷,7-(3,5-二羟基-1,1,5-三甲基环己叉基)-9-甲基丙++ + -8-烯基9-O-β-D-吡喃葡萄糖苷和3-羟基-5,6 -环氧-β-紫罗兰9-O-β-D-吡喃葡萄糖苷。剩下的四个新化合物的结构被阐明是3-羟基-5,6-环氧-β-紫罗兰醇9-O-β-D-吡喃葡萄糖苷的2'-O-β-D-apiofuranosyl衍生物,称为早老总苷,苯甲醇β-D-(2'-O-β-D-吡喃喃糖基)葡萄糖吡喃糖苷,苯乙醇β-D-(2'-O-β-D-吡喃吡喃糖基)葡萄糖吡喃糖苷和4,4'-二甲氧基-β -truxinic acid catalpol dister的光谱分析。