Ramipril Impurity A (isopropyl ester) CAS No. : 295328-72-2Molecular Formula: C24H34N2O5Molecular Weight : 430.54Chemical Name : (2S,3aS,6aS)-1-(((S)-1-isopropoxy-1-oxo-4-phenylbutan-2-yl)-L alanyl)octahydrocyclo penta [b] pyrrole-2-carboxylic acid Hexahydro imp CAS No. : 99742-35-5Molecular Formula: C23H38N2O5Molecular Weight : 422.56Chemical Name : (2S,3aS,6aS)-1-(((S)-4-cyclohexyl-1-ethoxy-1-oxobutan-2-yl)-L-alanyl)octahydrocyclopenta[b]pyrrole-2-carboxylic acid