Primocarcin ,its CAS NO. is 3750-26-3,the synonyms is 4-Acetamido-4-penten-3-one-1-carboxamide ; 5-(Acetylamino)-4-oxo-5-hexenamide ; BRN 2415620 ; NSC 525602 ; 5-Hexenamide, 5-(acetylamino)-4-oxo- (9CI) .