To investigate chemical constituents of Eriobotrya japonica(Thunb.) Lindl.leaf,six compounds were isolated by combination of RP-18,silica gel and Sephadex LH-20 column chromatographies,and their structures were identi...To investigate chemical constituents of Eriobotrya japonica(Thunb.) Lindl.leaf,six compounds were isolated by combination of RP-18,silica gel and Sephadex LH-20 column chromatographies,and their structures were identified by chemical and spectral methods.They were identified as tricosanoic acid(Ⅰ),phenylpropyl acid(Ⅱ),rutin(Ⅲ),2β,3β,19α-trihydroxyurs-12-en-28-oic acid(Ⅳ),2α,3α,19α-trihydroxyurs-12-en-28-oic acid(Ⅴ),Nerolidol-3-O-α-L-rhamnopyranosyl(1→4)-α-L-rhamnopyranosyl(1→2)-[α-L-rhamnopyranosyl(1→6)]-β-D-glucopyranoside(Ⅵ).Compound Ⅰ,Ⅱ and Ⅳ were isolated from this plant for the first time.展开更多
从芸香科植物飞龙掌血中提取分离出4个新三萜酸,经波谱数据分析,分别鉴定为2α,3α,19αtrihydroxy11oxo urs12en28oicacid(1),2α,3α,11α,19αtetrahydroxy urs12en28oicacid(2),2α,3αdihydroxy19oxo18,19sec o urs11,13(18)diene2...从芸香科植物飞龙掌血中提取分离出4个新三萜酸,经波谱数据分析,分别鉴定为2α,3α,19αtrihydroxy11oxo urs12en28oicacid(1),2α,3α,11α,19αtetrahydroxy urs12en28oicacid(2),2α,3αdihydroxy19oxo18,19sec o urs11,13(18)diene28oicacid(3)和2α,3β,19αtrihydroxy olean11,13(18)dien28oicacid(4)。还分离鉴定出已知成分野鸭春酸(5)、arjunicacid(6)、飞龙掌血素、勒钩内脂和β谷甾醇。展开更多
文摘To investigate chemical constituents of Eriobotrya japonica(Thunb.) Lindl.leaf,six compounds were isolated by combination of RP-18,silica gel and Sephadex LH-20 column chromatographies,and their structures were identified by chemical and spectral methods.They were identified as tricosanoic acid(Ⅰ),phenylpropyl acid(Ⅱ),rutin(Ⅲ),2β,3β,19α-trihydroxyurs-12-en-28-oic acid(Ⅳ),2α,3α,19α-trihydroxyurs-12-en-28-oic acid(Ⅴ),Nerolidol-3-O-α-L-rhamnopyranosyl(1→4)-α-L-rhamnopyranosyl(1→2)-[α-L-rhamnopyranosyl(1→6)]-β-D-glucopyranoside(Ⅵ).Compound Ⅰ,Ⅱ and Ⅳ were isolated from this plant for the first time.
