ramipril and its Impurities
An angiotensin-converting enzyme (ACE) inhiting drug, Ramipril is used in the treatment of hypertension and heart failure.Reference standards of Ramipril API,and its pharmacopeial, non pharmacopeial impurities, and stable isotopes are listed below.

![[2R,3aR,6aR]-1-[(2(R)-2-[[(1R)-1-Ethoxycarbonxyl)- PA 18 05540](https://www.pharmaffiliates.com/pimages/PA1805540.jpg)
[2R,3aR,6aR]-1-[(2(R)-2-[[(1R)-1-Ethoxycarbonxyl)-3-phenylpropyl]amino]-1-oxopropyl]octahydrocyclopenta[6]pyrrole-2-carboxylic Acid Benzyl Ester
[2R,3aR,6aR]-1-[(2(R)-2-[[(1R)-1-Ethoxycarbonxyl)-3-phenylpropyl]amino]-1-oxopropyl]octahydrocyclopenta[6]pyrrole-2-carboxylic Acid Benzyl Ester
Catalogue No.:PA 18 05540
CAS :
1356847-95-4
Molecular Formula : C30H38N2O5
Molecular Weight : 506.63

![[2S,3aR,6aR]-1-[(2(S)-2-[[(1R)-1-Ethoxycarbonxyl)- PA 18 05550](https://www.pharmaffiliates.com/pimages/PA1805550.jpg)
[2S,3aR,6aR]-1-[(2(S)-2-[[(1R)-1-Ethoxycarbonxyl)-3-phenylpropyl]amino]-1-oxopropyl]octahydrocyclopenta[6]pyrrole-2-carboxylic Acid Benzyl Ester
[2S,3aR,6aR]-1-[(2(S)-2-[[(1R)-1-Ethoxycarbonxyl)-3-phenylpropyl]amino]-1-oxopropyl]octahydrocyclopenta[6]pyrrole-2-carboxylic Acid Benzyl Ester
Catalogue No.:PA 18 05550
CAS :
1356352-52-7
Molecular Formula : C30H38N2O5
Molecular Weight : 506.63

![2-[N-[(R)-1-Ethoxycarbonyl-3-phenylpropyl]-L-alany PA 18 05560](https://www.pharmaffiliates.com/pimages/PA1805560.jpg)
2-[N-[(R)-1-Ethoxycarbonyl-3-phenylpropyl]-L-alanyl]-(1S,3S,5S)-2-azabicyclo[3.3.0]octane-3-carboxylic Acid Benzyl Ester
2-[N-[(R)-1-Ethoxycarbonyl-3-phenylpropyl]-L-alanyl]-(1S,3S,5S)-2-azabicyclo[3.3.0]octane-3-carboxylic Acid Benzyl Ester
Catalogue No.:PA 18 05560
CAS :
1356382-68-7
Molecular Formula : C30H38N2O5
Molecular Weight : 506.63


(2S,3aS,6aS)-Benzyl 1-((S)-2-(((S)-1-ethoxy-1-oxo-4-phenylbutan-2-yl)amino)propanoyl)octahydrocyclopenta[b]pyrrole-2-carboxylate
(2S,3aS,6aS)-Benzyl 1-((S)-2-(((S)-1-ethoxy-1-oxo-4-phenylbutan-2-yl)amino)propanoyl)octahydrocyclopenta[b]pyrrole-2-carboxylate
Catalogue No.:PAI 18 010010
CAS :
NA
Molecular Formula : C30H38N2O5
Molecular Weight : 506.63


(S)-2-(((S)-1-((2S,3aS,6aS)-2-((Benzyloxy)carbonyl)hexahydrocyclopenta[b]pyrrol-1(2H)-yl)-1-oxopropan-2-yl)amino)-4-phenylbutanoic Acid
(S)-2-(((S)-1-((2S,3aS,6aS)-2-((Benzyloxy)carbonyl)hexahydrocyclopenta[b]pyrrol-1(2H)-yl)-1-oxopropan-2-yl)amino)-4-phenylbutanoic Acid
Catalogue No.:PAI 18 010020
CAS :
NA
Molecular Formula : C28H34N2O5
Molecular Weight : 478.58


(2S,3aS,6aS)-Benzyl 1-((S)-2-(((S)-1-isopropoxy-1-oxo-4-phenylbutan-2-yl)amino)propanoyl)octahydrocyclopenta[b]pyrrole-2-carboxylate
(2S,3aS,6aS)-Benzyl 1-((S)-2-(((S)-1-isopropoxy-1-oxo-4-phenylbutan-2-yl)amino)propanoyl)octahydrocyclopenta[b]pyrrole-2-carboxylate
Catalogue No.:PAI 18 010030
CAS :
NA
Molecular Formula : C31H40N2O5
Molecular Weight : 520.66


Ramipril Related Compound A ((2S,3aS,6aS)-1-[(S)2-[[(S)-1-(methoxycarbonyl)-3-phenylpropyl]amino]-1 (1598314)
Ramipril Related Compound A ((2S,3aS,6aS)-1-[(S)2-[[(S)-1-(methoxycarbonyl)-3-phenylpropyl]amino]-1 (1598314)
Catalogue No.:PA USP1598314
CAS :
108313-11-7
Molecular Formula : NA
Molecular Weight : NA


Benzyl (2S,3aS,6aS)-1-(((S)-1-ethoxy-1-oxo-4-phenylbutan-2-yl)-D-alanyl)octahydrocyclopenta[b]pyrrole-2-carboxylate
Benzyl (2S,3aS,6aS)-1-(((S)-1-ethoxy-1-oxo-4-phenylbutan-2-yl)-D-alanyl)octahydrocyclopenta[b]pyrrole-2-carboxylate
Catalogue No.:PAI 18 010080
CAS :
NA
Molecular Formula : C30H38N2O5
Molecular Weight : 506.64


Benzyl (2R,3aR,6aR)-1-((1-ethoxy-1-oxo-4-phenylbutan-2-yl)alanyl)octahydrocyclopenta[b]pyrrole-2-carboxylate
Benzyl (2R,3aR,6aR)-1-((1-ethoxy-1-oxo-4-phenylbutan-2-yl)alanyl)octahydrocyclopenta[b]pyrrole-2-carboxylate
Catalogue No.:PAI 18 010110
CAS :
NA
Molecular Formula : C30H38N2O5
Molecular Weight : 506.64


Benzyl (2S,3aR,6aR)-1-(((S)-1-ethoxy-1-oxo-4-phenylbutan-2-yl)-L-alanyl)octahydrocyclopenta[b]pyrrole-2-carboxylate
Benzyl (2S,3aR,6aR)-1-(((S)-1-ethoxy-1-oxo-4-phenylbutan-2-yl)-L-alanyl)octahydrocyclopenta[b]pyrrole-2-carboxylate
Catalogue No.:PA 18 0051000
CAS :
NA
Molecular Formula : C30H38N2O5
Molecular Weight : 506.64


(2S,3aR,6aR)-1-(((S)-1-Ethoxy-1-oxo-4-phenylbutan-2-yl)-L-alanyl)octahydrocyclopenta[b]pyrrole-2-carboxylic Acid
(2S,3aR,6aR)-1-(((S)-1-Ethoxy-1-oxo-4-phenylbutan-2-yl)-L-alanyl)octahydrocyclopenta[b]pyrrole-2-carboxylic Acid
Catalogue No.:PA 18 0051001
CAS :
753405-33-3
Molecular Formula : C23H32N2O5
Molecular Weight : 416.52


(2R,3aR,6aR)-1-(((R)-1-Ethoxy-1-oxo-4-phenylbutan-2-yl)-D-alanyl)-3a,6a-dimethyloctahydrocyclopenta[b]pyrrole-2-carboxylic Acid
(2R,3aR,6aR)-1-(((R)-1-Ethoxy-1-oxo-4-phenylbutan-2-yl)-D-alanyl)-3a,6a-dimethyloctahydrocyclopenta[b]pyrrole-2-carboxylic Acid
Catalogue No.:PAI 18 010115
CAS :
NA
Molecular Formula : C25H36N2O5
Molecular Weight : 444.57


Isopropyl (2S)-2-((3S,5aS,8aS)-3-methyl-1,4-dioxodecahydro-2H-cyclopenta[4,5]pyrrolo[1,2-a]pyrazin-2-yl)-4-phenylbutanoate
Isopropyl (2S)-2-((3S,5aS,8aS)-3-methyl-1,4-dioxodecahydro-2H-cyclopenta[4,5]pyrrolo[1,2-a]pyrazin-2-yl)-4-phenylbutanoate
Catalogue No.:PA 18 0051005
CAS :
NA
Molecular Formula : C24H32N2O4
Molecular Weight : 412.53

![Benzyl (2S,3aS,6aS)-octahydrocyclopenta[b]pyrrole- PA 18 0051013](https://www.pharmaffiliates.com/pimages/PA180051013.jpg)
Benzyl (2S,3aS,6aS)-octahydrocyclopenta[b]pyrrole-2-carboxylate, ((benzyloxy)carbonyl)-L-phenylalaninate Salt
Benzyl (2S,3aS,6aS)-octahydrocyclopenta[b]pyrrole-2-carboxylate, ((benzyloxy)carbonyl)-L-phenylalaninate Salt
Catalogue No.:PA 18 0051013
CAS :
93779-32-9
Molecular Formula : C32H36N2O6
Molecular Weight : 544.65