19089-92-0 2-Butenoic acid, hexyl ester AI3-04687 BRN 2431113 CROTONIC ACID, HEXYL ESTER EINECS 242-808-8 FEMA No. 3354 Hexyl 2-butenoate Hexyl crotonate NSC 67983 n-Hexyl 2-butenoate n-Hexyl 2-butenoate (natural)