An object of the present invention is to provide a compound or a salt thereof which shows strong antibacterial activity and has excellent solubility in water, and a lyophilized formulation, an LpxC inhibitor, and an antibacterial agent comprising the compound or a salt thereof. The present invention provides a compound represented by the Formula [1] or a salt thereof:
wherein R
1
represents a hydrogen atom or the like, R
2
represents a hydrogen atom or the like, R
3
represents a hydrogen atom or the like, R
4
represents a hydrogen atom or the like, and n represents 0 or 1.
本发明的一个目的是提供一种在
水中具有优异溶解性并显示强抗菌活性的化合物或其盐,以及包括该化合物或其盐的冻干制剂、LpxC
抑制剂和抗菌剂。本发明提供一种由式[1]表示的化合物或其盐:
其中R1代表氢原子或类似物,R2代表氢原子或类似物,R3代表氢原子或类似物,R4代表氢原子或类似物,n代表0或1。