(2-Ethylcrotonoyl)urea (alpha-Ethylcrotonyl)carbamide (alpha-Ethylcrotonyl)urea 2-Butenamide, N-(aminocarbonyl)-2-ethyl- (9CI) 5982-97-8 Crotonyl ureide, alpha-ethyl- EINECS 227-794-3 N-(Aminocarbonyl)-2-ethyl-2-butenamide NSC 163913 Urea, (2-ethylcrotonoyl)- Urea, (alpha-ethylcrotonoyl)-