摘要
从宁夏产鹅绒藤(Cynanchum chinense R.Br.)地上部分的醇提取物中,分得一新的三萜酯,命名为鹅绒藤酯Ⅰ(cynanester A),经波谱分析和化学反应证明,酯Ⅰ的结构为羽扇醇正己酸酶(l;upeol caproate)。此外还分离鉴定了羽扇醇乙酸酯(lupeol acetate)、正廿四烷酸(lignoceric acid)和β-谷甾醇(β-sitosterol)。
Cynanester A (Ⅰ)a new triterpenoid ester was isolated, together with lupeol acetate, lignoceric acid and β-sitosterol, from Cynanchum chinense R. Br. (Asclepiadaceae). The mass spectrum suggested the presence of caproyl group and lupane skeleton with isopropenyl group in the molecule. Alkaline hydrolysis of Ⅰ with 5% methanolic potassium hydroxide yielded lupeol Ia and n- caproic acid. The acid was esterified with MeOH- H_2SO_4 to afford methyl caproate, by GLC comparison with authentic sample. The acid was also identified by IR comparison. As above, the structure of cynanester A was established as lupeol caproate.
出处
《药学学报》
CAS
CSCD
北大核心
1991年第12期918-922,共5页
Acta Pharmaceutica Sinica
关键词
鹅绒藤
鹅绒藤酯I
测定
Cynanchum chinense R. Br.
Cynanester A
Lupeol caproate
