New Oleanane-Type Triterpenoids from the Stems of Alangium chinense

Two new oleanane-type triterpenoids,( 3E,23E)-3-caffeoyl-23-coumaroylhederagenin( 1)and( 3E,23E)-dicoumaroylhederagenin( 2),together with two known analogues were isolated from the stems of traditional Chinese medicine Alangium chinense. The structures of two new compounds were determined by the spectroscopic method,and the known compounds were defined as( 23E)-coumaroylhederagenin( 3) and( 23Z)-coumaroylhederagenin( 4) based on the observed and reported NMR data. All compounds were isolated from the genus Alangium for the first time.