333-56-2 4-03-00-01611 (Beilstein Handbook Reference) 8-Fluoro-3-oxo-octanoic acid ethyl ester BRN 1775525 Ethyl 8-fluoro-3-oxooctanoate Ethyl omega-fluoro-3-oxooctanoate OCTANOIC ACID, 8-FLUORO-3-OXO-, ETHYL ESTER