2-(3-Acetylamino-2-hydroxy-5-methylphenylazo)-4-nitrophenol

N-[3-(2-Hydroxy-5-nitrophenylazo)-2-hydroxy-5-methylphenyl]acetamide

N-[2-hydroxy-3-[(2-hydroxy-5-nitrophenyl)azo]-5-methylphenyl]acetamide