2-Butenamide, N-(4-((4-(acetylamino)phenyl)sulfonyl)phenyl)- 4-Acetylamino-4'-crotonoylaminodiphenyl sulfone Crotonanilide, 4'-((p-acetamidophenyl)sulfonyl)- EM2550000 N-(4-((4-(Acetylamino)phenyl)sulfonyl)phenyl)-2-butenamide