The invention relates to antibacterial compounds of formula I wherein R1 is alkoxy or halogen U and V each independently are CH or N is a bond or is absent W is CH or N or, when is absent, W is CH2 or NH, with the proviso that U, V and W are not all N A is a bond or CH2 R2 is H or, provided A is CH2, may also be OH m and n each independently are 0 or 1 D is CH2 or a bond G represents a phenyl group substituted once or twice in the meta and/or para position(s) by substituents selected from alkyl, (C1-C3)alkoxy and halogen, or G is a group G1 or G2 wherein Z1, Z2 and Z3 may each represent CH or N X is N or CH and Q is O or S it being understood that if m and n each are 0, then A is CH2 and salts of such compounds.
