Triterpenes fromAlstonia scholaris(L.) R. Br.Flowers

摘要

Chemical investigation of the dichloromethane extract of the flowers of Alstonia scholaris(L.) R. Br. afforded mixtures of alpha;-amyrin acetate (1a), beta;-amyrin acetate (1b) and lupeol acetate (1c); and alpha;-amyrin fatty acid esters (2a), beta;-amyrin fatty acid esters (2b), lupeol fatty acid esters (2c)and phytyl fatty acid esters (2d). The structures of 1a-2d were identified by comparison of their NMR data with literature data.