2-((2,5-Dichlorophenyl)azo)-N-(2,3-dihydro-2-oxo-1H-benzimidazol-5-yl)-3-oxobutyramide 56046-83-4 Butanamide, 2-((2,5-dichlorophenyl)azo)-N-(2,3-dihydro-2-oxo-1H-benzimidazol-5-yl)-3-oxo- EINECS 259-959-0