2-Fluoroethyl 5-fluoropentanecarboxylate 2-Fluoroethyl 6-fluorohexanoate 3-02-00-00735 (Beilstein Handbook Reference) 591-69-5 BRN 1764600 HEXANOIC ACID, 6-FLUORO-, 2'-(FLUOROETHYL) ESTER Hexanoic acid, 6-fluoro-, 2-fluoroethyl ester