| abstract |
Disclosed is a compound represented by the general formula: n n n n n n n n n n wherein R 1 represents an aryl or heterocyclic group which may be substituted or the like; X 1 represents a C 2 -C 4 alkylene group or the like; X 2 , X 3 and X 5 independently represent NH, a bond or the like; X 4 represents a lower alkylene group, a bond or the like; Y 1 represents a bivalent alicyclic hydrocarbon residue which may be substituted or a bivalent alicyclic amine residue which may be substituted; and Z 1 , Z 2 , Z 3 , Z 4 , Z 5 and Z 6 independently represent a nitrogen atom, a group represented by the formula: CH, or the like, provided that at least one of Z 3 , Z 4 , Z 5 and Z 6 represents a nitrogen atom, or a salt thereof, which is useful as an antibacterial agent. |