Chemistry of the meliacins (limonoids). The structure of melianin A, a new protomeliacin from Melia azedarach

Abstract

Evidence is presented for the structures of a new protomeliacin (melianin A) and the related melianin B, which co-occur with gedunin (or 7-deacetoxy-7-oxogedunin), nimbolin A, fraxinellone, and cycloeucalenone in the wood extracts of Melia azedarach.