1-Naphthol-3-sulfonicacid, 7-methylamino- (6CI);2-(Methylamino)-8-hydroxy-6-naphthalenesulfonicacid;4-Hydroxy-6-(methylamino)-2-naphthalenesulfonic acid;8-Hydroxy-2-(methylamino)-6-naphthalenesulfonic acid;N-Methyl-Gamma acid;
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