Abs trac t --The structure of (-)-ampelopsin D, hydroxystilbene dimer, was reinvestigated using spectroscopic methods.Furthermore, the relative and absolute stereostructures w ere discuss ed on the basis of chemical transformation of (+)-ε-viniferin to (-)-ampelopsin D.In 1993, Y. Oshima et al. reported the isolation and structure of a hydroxystilbene dimer named (-)-
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Niwa et al. (2000) studied this question.