Struthiolanone (1), a flavanone-resveratrol adduct, was isolated from Struthiola argentea. Its structure was determined by high-resolution mass spectrometry and 1D- and 2D-NMR spectroscopic techniques. The absolute configuration was determined by comparison of the CD spectrum of biflavonoids. This compound appears to be the first example of a flavanoid-stilbene adduct.
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