The invention relates to antibacterial compounds of formula I wherein n is 0 or 1; R1 represents H or F; U represents CH2 or, provided n is 1, O or NH; “-----” is a bond or is absent; V represents CH or N when “-----” is a bond, or CH2 or NH when “-----” is absent; W represents CH or N; A represents —(CH—)p—NH—(CH2)q— wherein p is 1 and q is 1 or 2 or, provided U represents CH2 and n is 1, p may also be 0 and q is then 2; G represents one of the groups wherein Z represents N or CH and Q represents O or S; and Z0, Z1 and Z2 each represent CH, or Z0 and Z1 each represent CH and Z2 represents N, or Z0 represents CH, Z1 represents N and Z2 represents CH or N, or Z0 represents N and Z1 and Z2 each represent CH; and to salts of such compounds.