Tetranortriterpenoids from Swietenia macrophylla

Abstract

Five new tetranortriterpenoids, methyl β-tigloyloxy-2,6-dihydroxy-1- oxo-meliac-8(30)-enate, methyl 3β-tigloyloxy-2-hydroxy-1-oxo-meliac-8(30)- enate, methyl β-tigloyloxy-2-hydroxy-8α,30α-epoxy-1-oxo-meliacate, methyl 3β-acetoxy-2,6-dihydroxy-8α,30α-epoxy-1-oxo-meliacate and methyl 3β- isobutyryloxy-2,6-dihydroxy-8α,30α-epoxy-1-oxo-meliacate, were isolated from the seeds of Swietenia macrophylla. The structure of these five tetranortriterpenoids was established by comprehensive spectral analysis.