2-Bromohexanoic acid ethyl ester 615-96-3 63034-18-4 63927-44-6 EINECS 210-455-9 Ethyl 2-bromocaproate Ethyl 2-bromohexanoate Ethyl alpha-bromocaproate Hexanoic acid, 2-bromo-, ethyl ester NSC 8879 alpha-Bromocaproic acid, ethyl ester