CHEMICAL CONSTITUENTS ISOLATED BY ACETYLATION OF ERIOBOTRYA ANGUSTISSIMA'S LEAVES

Tóm tắt

Eriobotrya angustissima Hook.F. (Son tra hep) belongs to the family Rosaceae. Its leaves were collected at National Garden Bi Dup in Lam dong province. The research showed that, many triterpenes are very difficult to be separated from each other so that they can be obtained only as acetylated products. From a fraction of the ethyl acetate extract from Eriobotrya angustissima’s leaves, four acetylated products (1a) -O-acetylursolic acid, (2a) -O-acetylpomolic acid, (3a) 2α,3α-di-O-acetyl-19-hydroxy-12-ursene-28-oic acid and (3b) 2α-O-acetyl-3,19-dihydroxy-12-ursene-28-oic acid were isolated from this fraction. The structure of these compounds was determined using MS, NMR spectroscopic data and by comparison with reported data. This is the first report on chemical constituents of Eriobotrya angustissima growing in Vietnam.