Abstract: 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 R1 represents a hydrogen atom or the like, R2 represents a hydrogen atom or the like, R3 represents a hydrogen atom or the like, R4 represents a hydrogen atom or the like, and n represents 0 or 1.

Abstract: This pharmaceutical composition contains a hvdroxamic acid derivative, or a salt thereof, and a solubilizer, said hydroxamic acid derivative being selected from among (2S)-2-((4-((4-((1S)-1,2-dihydroxyethyl)phenyl)ethynyl)benzoyl)(methyl)amino)-N-hydroxy-N?,2- dimethylmalonamide, (2S)-2-((4((4-((1R)-1,2-dihydroxyethyl)phenyl)ethynyl)benzoyl)(methyl)amino)-N-hydroxy-N?,2-dimethylmalonamide, and (2S)-N-hydroxy-2-((4-((4-((1S)-1-hydroxy-2-methoxyethyl)phenyl)ethynyl)benzoyl)(methyl)amino)-N?,2-dimethylmalonamide. The pharmaceutical composition demonstrates strong antibacterial activity, has excellent solubility in water, and is useful as a drug.

Abstract: This pharmaceutical composition contains a hydroxamic acid derivative, or a salt thereof, and a solubilizer, said hydroxamic acid derivative being selected from among (2S)-2-((4-((4-((1S)-1,2-dihydroxyethyl)phenyl)ethynyl)benzoyl)(methyl)amino)-N-hydroxy-N?,2-dimethylmalonamide, 2S)-2-((4-((4-((1R)-1,2-dihydroxyethyl)phenyl)ethynyl)benzoyl)(methyl)amino)-N-hydroxy-N?,2-dimethylmalonamide, and (2S)-N-hydroxy-2-((4-((4-((1S)-1-hydroxy-2-methoxyethyl)phenyl)ethynyl)benzoyl)(methyl)amino)-N?,2-dimethylmalonamide. The pharmaceutical composition demonstrates strong antibacterial activity, has excellent solubility in water, and is useful as a drug.

Abstract: This pharmaceutical composition contains a hydroxamic acid derivative, or a salt thereof, and a solubilizer, said hydroxamic acid derivative being selected from among (2S)-2-((4-((4-((1S)-1,2-dihydroxyethyl)phenyl)ethynyl)benzoyl)(methyl)amino)-N-hydroxy-N?,2-dimethylmalonamide, (2S)-2-((4-((4-((1R)-1,2-dihydroxyethyl)phenyl)ethynyl)benzoyl)(methyl)amino)-N-hydroxy-N?,2-dimethylmalonamide, and (2S)—N-hydroxy-2-((4-((4-((1S)-1-hydroxy-2-methoxyethyl)phenyl)ethynyl)benzoyl)(methyl)amino)-N?,2-dimethylmalonamide. The pharmaceutical composition demonstrates strong antibacterial activity, has excellent solubility in water, and is useful as a drug.

Abstract: A heterocyclic compound represented by the general formula (In the formula, R1, R2 and R3 may be the same or different, and each represents a hydrogen atom, a halogen atom, or this general formula (X1—Y1—R4) (in the formula: X1 represents this general formula (NR5) (in the formula, R5 represents a hydrogen atom, etc.) or the like; Y1 represents an optionally substituted C1-6 alkylene group or the like; and R4 represents an optionally substituted aryl group or the like), and Z represents a nitrogen atom or this general formula (CR6) (in the formula, R6 represents a hydrogen atom, a halogen atom, or an optionally substituted C1-12 alkyl group or the like)), or a salt thereof, exhibits excellent anti-HIV activity and is useful as an anti-HIV agent.