((2S,3S)-2-(1R)-2-[(4-chlorphenyl)sulfanyl]-1-methyl-2-oxoethyl-3-((1R)-1-hydroxyethyl)-4-oxoazetidin-1-yl)eddikesyre
((2S,3S)-2-(1R)-2-[(4-chlorophenyl)sulfanyl]-1-methyl-2-oxoethyl-3-((1R)-1-hydroxyethyl)-4-oxoazetidin-1-yl)acetic acid