the 4-quinolones ciprofloxacin , difloxacin , enoxacin , norfloxacin , ofloxacin , and nalidixic acid were found to induce the sos response in qualitative and quantitative tests on escherichia coli k12 containing the sfia : :lacz gene fusion .
C0358919
4-quinolones
C0027353
nalidixic acid