NOVEL HYDROXAMIC ACID DERIVATIVE OR SALT THEREOF

摘要

A compound represented by general formula (1) (wherein R 1 represents a hydrogen atom, an optionally substituted C 1-6 alkyl group or the like; R 2 represents a hydrogen atom, an optionally substituted C 1-6 alkyl group or the like; R 3 represents a hydrogen atom or an optionally substituted C 1-6 alkyl group; R 4 represents a hydrogen atom, an optionally substituted C 1-6 alkyl group or the like; X 1 represents an optionally substituted C 2-6 alkynylene group or the like; A represents an optionally substituted bivalent aromatic hydrocarbon group or the like; X 2 represents an optionally substituted C 1-6 alkylene group or the like; Y 1 represents an oxygen atom or the like; and R 5 represents a hydrogen atom or the like) or a salt thereof is useful as an antibacterial agent.