Benzoicacid, 5-[(2-carboxyphenyl)azo]-2-hydroxy- (9CI); Benzoic acid,6'-hydroxy-2,3'-azodi- (6CI); 2',3-Dicarboxy-4-hydroxyazobenzene;3-Carboxy-4-hydroxy-2'-carboxyazobenzene; NSC 206212
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