Abstract

A-Hydroxy-4-(3-hydroxy-1-butenyl)-3,3,5-trimethylcyclohexanone (6,9-dihydroxymegastigm-7-en-3-one) was synthesized from vomifoliol and was identified for the first time as a common constituent of Vitis vinifera grapes in both free and conjugated forms, as well as a minor constituent of French and American oakwood extracts. The corresponding β- d-glucopyranoside was isolated from a Riesling wine.

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