1-(4-Methoxycarbonylphenylimino)-2-phenyl-3-(4-carboxyphenylamino)indene potassium salt 1-Methyl 4-((3-((4-carboxyphenyl)amino)-2-phenyl-1H-inden-1-ylidene)amino)benzoate monopotassium salt 129884-95-3 Benzoic acid, 4-((3-((4-carboxyphenyl)amino)-2-phenyl-1H-inden-1-ylidene)amino)-, 1-methyl ester, monopotassium salt