4-02-00-00809 (Beilstein Handbook Reference) 4-Fluorobutyric acid methyl ester 406-20-2 BRN 1744847 BUTYRIC ACID, 4-FLUORO-, METHYL ESTER Methyl 4-fluorobutyrate Methyl gamma-fluorobutyrate Methylester kyseliny 4-fluormaselne [Czech] TL 1095