Antibacterial agents

A compound of formula II:

• or a stereoisomer or pharmaceutically acceptable salt thereof, wherein:
• A is selected from the group consisting of:
• (a) substituted C1-C6 alkyl, wherein at least one substituent is hydroxy;
• and
• (b) substituted C3-C6 cycloalkyl, wherein at least one substituent is selected from hydroxy and hydroxyalkyl;
• G is selected from the group consisting of:
• a) —CH═CH—C≡C—;
• (b) —C≡C—CH═CH—;
• D is selected from the group consisting of:
• wherein:
• Q is O or NR, wherein R is hydrogen or an unsubstituted C1-C3 alkyl;
• R1 and R2 independently are selected from the group consisting of hydrogen, substituted C1-C3 alkyl, and unsubstituted C1-C3 alkyl, or R1 and R2, together with the carbon atom to which they are attached, form an unsubstituted C3-C6 cycloalkyl group or an unsubstituted 4-6 membered heterocyclic group;
• and
• R3 is selected from the group consisting of hydrogen, substituted C1-C6-alkyl, unsubstituted C1-C6-alkyl, substituted cycloalkyl, unsubstituted cycloalkyl, substituted cycloalkylalkyl, unsubstituted cycloalkylalkyl, substituted aryl, unsubstituted aryl, substituted arylalkyl, unsubstituted arylalkyl, substituted heterocyclyl, or unsubstituted heterocyclyl, substituted heterocyclylalkyl, unsubstituted heterocyclylalkyl, substituted heteroaryl, unsubstituted heteroaryl, substituted heteroarylalkyl, and unsubstituted heteroarylalkyl.