Methanesulfonic anhydride7143-01-3100 % similar Methyl methanesulfonate66-27-353 % similar Busulfan55-98-145 % similar Ethyl methanesulfonate62-50-045 % similar Isopropyl methanesulfonate926-06-745 % similar Phenyl methanesulfonate16156-59-538 % similar Butyl methanesulfonate1912-32-938 % similar 2,2,2-Trifluoroethyl methanesulfonate25236-64-038 % similar Methylsulfonylmethane67-71-031 % similar