2'-Fluoroethyl 6-fluorohexanoate 4-02-00-00932 (Beilstein Handbook Reference) 589-79-7 BRN 1756049 Ethyl 5-fluoropentanecarboxylate Ethyl 6-fluorohexanoate Ethyl omega-fluorohexanoate HEXANOIC ACID, 6-FLUORO-, ETHYL ESTER