4-11-00-00250 (Beilstein Handbook Reference) 4-Fluorobutyl 4-methylbenzenesulfonate 4-Fluorobutyl p-toluenesulphonate 433-10-3 BRN 3314841 Benzenesulfonic acid, 4-methyl-, 4-fluorobutyl ester (9CI) Fluorobutyl tosylate p-Toluenesulfonic acid, 4-fluorobutyl ester