Synonyms: 2H-1-Benzopyran-3,5,7-triol,2-(3,4-dihydroxyphenyl)-3,4-dihydro-, trans-(?à)-; Catechol, (?à)- (8CI); (?à)-Catechin; (?à)-Catechol; 2H-1-Benzopyran-3,5,7-triol,2-(3,4-dihydroxyphenyl)-3,4-dihydro-, trans-; DL-Catechin; Racemic catechin;dl-Catechin; dl-Catechol; rac-Catechin