2-((2-Hydroxy-5-((methylamino)sulphonyl)phenyl)azo)-3-oxo-N-phenylbutyramide 2-((2-Hydroxy-5-(N-methylsulfonamido)phenyl)azo)-N-phenyl-3-oxobutanamide 21811-94-9 Butanamide, 2-((2-hydroxy-5-((methylamino)sulfonyl)phenyl)azo)-3-oxo-N-phenyl- EINECS 244-591-5