escherichia coli mutants with defects in dna repair were found to be sensitive to both 1-methyl-4-phenyl-5-nitroimidazole ( 4 ) and metronidazole , but fairly resistant to 1-methyl-4-nitro-5-phenylimidazole ( 6 ) , a finding in accord with the relative biological activity of 4- and 5-nitroimidazoles examined previously .
C0028179
nitroimidazole
C0025872
metronidazole