(2R,2'R,3R,3'R,4S)-5,5',7,7'-Tetrahydroxy-2,2'-bis(3,4,5-trihydroxyphenyl)-3,3',4,4'-tetrahydro-2H,2'H-4,6'-bichromene-3,3'-diyl bis(3,4,5-trihydroxybenzoate) AIDS-051687 AIDS051687 Proanthocyanidin der.