3750-26-3 4-Acetamido-4-penten-3-one-1-carboxamide 5-(Acetylamino)-4-oxo-5-hexenamide 5-HEXENAMIDE, 5-ACETAMIDO-4-OXO- 5-Hexenamide, 5-(acetylamino)-4-oxo- (9CI) BRN 2415620 NSC 525602 Primocarcin