2H-1-Benzopyran-3,4,7,8-tetrol, 2-(3,4-dihydroxyphenyl)-3,4-dihydro-, (2R-(2alpha,3alpha,4alpha))- 3,3',4,4',7,8-Hexahydroxyflavan 38081-16-2 38412-73-6 38602-96-9 489-56-5 Melacacidin