alkylating agent methanesulfonate ester busulfan Mitostan Tetramethylene bis(methanesulfonate) Myeloleukon A methanesulfonate ester that is butane-1,4-diol in which the hydrogens of the hydroxy groups are replaced by methanesulfonyl groups. An alkylating antineoplastic agent, it is used for the treatment of chronic myeloid leukemia (although it has been largely replaced by newer drugs). It is also used as an insect sterilant. Mielucin butane-1,4-diyl dimethanesulfonate 1,4-Butanediol dimethanesulfonate Bisulfex busulfanum Mablin Misulban 1,4-Dimethanesulfonoxybutane Myleran Busulfan busulfano Leucosulfan 1,4-Bis(methanesulfonoxy)butane 1,4-Dimesyloxybutane butane-1,4-diyl dimethanesulfonate busulfan antineoplastic agent butane-1,4-diol carcinogenic agent teratogenic agent insect sterilant