Robuta

https://pubmed.ncbi.nlm.nih.gov/9404057/ Contents of resveratrol, piceid, and their isomers in commercially available wines made from grapes... The presence of resveratrol (3,5,4'-trihydroxystilbene) and its beta-glucoside, piceid (resveratrol-3-beta-D-glucopyranoside), together with their isomers in...