Three New Quassinoid Derivatives and Related Compounds as Antitumor Promoters fromBrucea javanica
摘要:
Three new quassinoid derivatives [desmethyl-brusatol (1), desmethyl- bruceantinoside A (2), and butyl ester (3) of bruceoside D (6)] were isolated from the extract of Brucea javanica. Their structures were elucidated by spectral evidence and chemical transformation to or from known compounds. The three new quassinoid derivatives and related compounds have shown inhibitory effects against TPA-induced Epstein–Barr virus early antigen (EBV-EA) activation.