Tetranortriterpenoids from Swietenia macrophylla

Abstract

Five new tetranortriterpenoids, methyl 3β-tigloyloxy-2, 6-dihydroxy-1-oxo-meliac-8(30)-enate, methyl 3β-tigloyloxy-2-hydroxy-1-oxo-meliac-8(30)-enate, methyl 3β-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.