372-37-2 4-03-00-01546 (Beilstein Handbook Reference) ACETOACETIC ACID, 4-FLUORO-, ETHYL ESTER BRN 1761273 Butanoic acid, 4-fluoro-3-oxo-, ethyl ester (9CI) Ethyl 4-fluoroacetoacetate Ethyl omega-fluoroacetoacetate NSC 523377