Cilastatin : (Z)-7-[[(2R)-2-amino-2-carboxyethyl]sulfanyl]-2-[[[(1S)-2,2-dimethylcyclopropyl]carbonyl]amino]hept-2-enoic acid ;
Cilastatin EP Impurity C : (Z)-7-[[(2R)-2-carboxy-2-[(1,1-dimethyl-3-oxobutyl)amino]ethyl]sulfanyl]-2-[[[(1S)-2,2-dimethylcyclopropyl]carbonyl]amino]hept-2-enoic acid ;
Cilastatin EP Impurity G : (E)-(2RS)-7-[[(2R)-2-amino-2-carboxyethyl]sulfanyl]-2-[[[(1S)-2,2-dimethylcyclopropyl]carbonyl]amino]hept-3-enoic acid