Absolute structures of new hydroxystilbenoids, vitisin C and viniferal, from Vitis vinifera 'Kyohou'

Article abstract of DOI:10.1016/0040-4020(96)00543-1

Two new hydroxystilbenoids named visitin C and viniferal were isolated from Vitis vinifera 'Kyohou' and the structures were characterized on the basis of spectroscopic and chemical evidence. Furthermore, the absolute configurations of (-)-vitisin B and (-)-cis-vitisin B as well as (+)-vitisin C and (-)-viniferal were determined by the synthetic evidence from (+)l-ε-viniferin.