(-)-Epicatechin (-)-Epicatechol 2H-1-Benzopyran-3,5,7-triol, 2-(3,4-dihydroxyphenyl)-3,4-dihydro-, (2R-cis)- 490-46-0 EPIGALLOCATECHIN Epicatechin Epicatechol Epicatechol, (-)- NSC81161 epi-Catechol l-Epicatechin l-Epicatechol