Abstract
A new flavanone, namely 2-(S)-6,7,3’,5′-tetrahydroxyflavanone, was separated from the ethanol extracts of the dried vine stems of Spatholobus suberectus dunn, together with three known ones, 2-(S)-7,3’,5′-trihydroxyflavanone, liquiritigenin and butin. The structure of the new flavanone was identified by detailed analyses of the spectroscopic data, especially 1D and 2D NMR, and HR-ESI-MS.
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