2-Butenoic acid, 3,7-dimethyl-6-octenyl ester 3,7-Dimethyl-6-octenyl 2-butenoate 6-OCTEN-1-OL, 3,7-DIMETHYL-, CROTONATE 68039-38-3 Citronellyl but-2-enoate Citronellyl crotonate EINECS 268-254-7