1912-32-9 2-Butyl methanesulfonate 4-04-00-00014 (Beilstein Handbook Reference) AI3-50049 BRN 1753437 Butyl mesylate Butyl methanesulfonate Butyl methanesulphonate EINECS 217-620-4 METHANESULFONIC ACID, BUTYL ESTER NSC 36060 n-Butyl methanesulfonate n-Butylmethanesulfonate