| abstract |
General formula [Chemical formula 1] “In the formula, a broken line represents a single bond or a double bond; R 1 , R 2 , R 3 , R 4 and R 5 are the same or different and each represents a hydrogen atom, a halogen atom, an optionally substituted lower alkyl, Aryl, lower alkoxy or monocyclic heterocyclic group, etc .; R 6 is optionally substituted lower alkyl, aryl, monocyclic heterocyclic, bicyclic heterocyclic or tricyclic heterocyclic A cyclic group; X 1 represents a lower alkylene group, etc .; X 2 represents an optionally substituted lower alkylene, lower alkenylene or lower alkynylene group; X 3 represents an oxygen atom, a sulfur atom, a sulfinyl group, a sulfonyl Y 1 represents an optionally substituted divalent nitrogen-containing ring, etc .; Z 1 represents a nitrogen atom or an optionally substituted carbon atom, etc. Nitrogen heterocyclic compounds Its salt, since it has a strong antibacterial activity and high safety, are useful as an excellent antibacterial agent. |