5-[4-(o-Nitrophenylazo)-3-hydroxy-2-naphthoylamino]-2,3-dihydro-1H-benzimidazol-2-one

N-(2,3-dihydro-2-oxo-1H-benzimidazol-5-yl)-3-hydroxy-4-[(2-nitrophenyl)azo]naphthalene-2-carboxamide