3,3'-dicarboxy-4,4'-diamino-diphenylmethane, 5,5'-methylenedianthranilic acid, 4,4'-diaminodiphenylmethane 3,3'-dicarboxylic aicd, 4,4'-methylenebisanthranilic acid, 3,3'-Dicarboxy-4,4'-diaMinophenyl Methane, 4,4-diamino-3,3'-dicarboxydiphenylmethane
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