Novel compounds belonging to the class of oxazolidinones possessing potent antimycobacterial properties especially useful in the treatment of acid fast organisms such as
Mycobacterium tuberculosis, Mycobacterium avium
-intracellular complex,
M. fortuitum
and
M. kansai
. The compound and its pharmaceutically acceptable salts thereof act as antibacterial agents. Also disclosed is a method for inhibiting growth of mycobacterial cells as well as a method of treating mycobacterial conditions such as
Mycobacterium tuberculosis
, drug resistant
Mycobacterium tuberculosis, Mycobacterium avium
-intracellular complex,
M. fortuitum
and
M. kansai
, comprising administering an antimycobacterially effective amount of the said compound and/or pharmaceutically acceptable salts thereof. There is also disclosed a process for the manufacture of the said compound or its pharmaceutically acceptable salts.