A new flavonostilbene, leachianone I, was isolated from the root of So
phora leachiana in addition to two known stilbene oligomers [(-)-epsil
on-viniferin and hopeaphenol]. The structure of leachianone I was eluc
idated by spectroscopic analysis to be a (2S)-5,7,2',4'-tetrahydroxyfl
avanone condensed with resveratrol through the B ring, and with an (E)
-3-hydroxymethyl-2-butenyl group at C-8 as a side-chain.