Fluoro-pyridinone derivatives useful as antibacterial agents

A compound of the formula:

• or a pharmaceutically acceptable salt thereof,
• in which:
• R1 is represented by C1-C3 alkyl;
• R2 is represented by hydrogen or C1-C3 alkyl;
• R3 is represented by hydrogen, halogen, hydroxy, cyano, C1-C3alkyl, C1-C3alkoxy, trifluoromethyl or trifluoromethoxy;
• T is represented by ethynyl, optionally substituted (C6-C10)aryl or optionally substituted heteroaryl;
• D is absent, or is represented by —(CH2)r—, —(CH2)n—O—(CH2)p—, or a bond;
• r is represented by the integer 1, 2, or 3;
• n and p are each independently represented by the integer 0, 1, or 2;
• E is absent, or is represented by a substituent selected from the group consisting of:
• i) (C3-C10)cycloalkyl, optionally substituted;
• ii) (C6-C10)aryl optionally substituted;
• iii) heteroaryl, optionally substituted;
• and
• iv) heterocyclic, optionally substituted;
• with the proviso that:
• 1) if E is absent, then D is also absent;
• 2) T is not represented by unsubstituted phenyl;
• when E and D both are absent, R3 is hydrogen and R1 and R2 are each methyl.