5-[(1E)-2-[4-(Phenylmethoxy)phenyl]ethenyl]-1,3-benzenediol-d7 is the isotope labelled analog of 5-[(1E)-2-[4-(Phenylmethoxy)phenyl]ethenyl]-1,3-benzenediol (P335645); the impurity D of Resveratrol (R150000) which is a minor constituent of wine, correlated with serum lipid reduction and inhibition of platelet aggregation. Resveratrol is a specific inhibitor of COX-1 and also inhibits the hydroperoxidase activity of COX-1. It has been shown to inhibit events associated with tumor initiation, promotion and progression. Molecular Formula: C21H11D7O3 Molecular Weight: 325.41000000000003