2-methoxy-5-methyl-4-(4-sulfophenylazo)aniline 2-Methoxy-5-methyl-4-[(4-sulfophenyl)azo]benzenamine 4-[(4-amino-5-methoxy-2-methylphenyl)azo]benzenesulfonic acid p-(4-amino-5-methoxy-o-tolylazo)-benzenesulfonic acid p-[(4-amino-5-methoxy-o-tolyl)azo]benzenesulphonic acid 4-[(4-Amino-5-methox Benzenesulfonic acid, 4-[2-(4-amino-5-methoxy-2-methylphenyl)diazenyl]- 4-[(4-Amino-5-methoxy-2-methylphenyl)azo]benzenesulfonicaci