Source:http://linkedlifedata.com/resource/umls/id/C0007404
MSH: An antioxidant flavonoid, occurring especially in woody plants as both (+)-catechin and (-)-epicatechin (cis) forms.,NCI: A flavonol with a hydroxyl group at C-5, -7, -3', and -4'. The (+) enantiomer has the R and S configuration at C-2, and C-3, respectively.