Notes: trans-Resveratrol-4'-O-D-glucuronide is a phase II metabolite of the antioxidant trans-resveratrol (Item No. 70675).{47175} trans-Resveratrol-4'-O-D-glucuronide is formed via glucuronidation of trans-resveratrol by the UDP-glucuronosyltransferase (UGT) isoform UGT1A9.