pounds were evaluated in vitro against Mycobacterium tuberculosis H37Rv at
12.5 mug/ml in BACTEC 12B medium using the BACTEC radiometric system. Among
the compounds tested, S-10 showed promising activity, with 100% inhibition
at a concentration lower Mannich bases of norfloxacin were synthesized by
reacting them with formaldehyde and several isatin derivatives. The lower t
han 6.25 mug/ml.