(2R,2'R,3S,3'R,4S)-3,5,5',7,7'-Pentahydroxy-2,2'-bis(3,4,5-trihydroxyphenyl)-3,3',4,4'-tetrahydro-2H,2'H-4,8'-bichromen-3'-yl 3,4,5-trihydroxybenzoate AIDS-051686 AIDS051686 Proanthocyanidin der.