2-[(2-amino-5-hydroxy-7-sulpho-1-naphthyl)azo]-5-nitrobenzoic acid

2-(2-Amino-5-hydroxy-7-sulfo-1-naphthalenylazo)-5-nitrobenzoic acid

2-[(2-Amino-5-hydroxy-7-sulfo-1-naphthalenyl)azo]-5-nitrobenzoic acid