the inducing effectiveness ( per alkylation in dna ) and efficiency ( compared with mutation frequency in e. coli sd-4 ) was found to decrease in the order 2-hydroxyethylating agents ( 2-hydroxyethyl methanesulphonate and ethylene oxide ) greater than isopropyl methanesulphonate approximately equal to methyl methanesulphonate greater than ethylating agents ( diethyl sulphate , ethyl methanesulphonate ) .
C0025619
methanesulphonate
C0015063
ethyl