N-Nitroso Ramipril

CAS No: NA
Chemical Name:
(2S,3aS,6aS)-1-(N-((S)-1-ethoxy-1-oxo-4-phenylbutan-2-yl)-N-nitroso-L-alanyl)octahydrocyclopenta[b]pyrrole-2-carboxylic acid
Molecular Formula:
C23H31N3O6

N-Nitroso EP impurity F

CAS No: NA
Chemical Name:
N-((S)-1-Ethoxy-1-oxo-4-phenylbutan-2-yl)-N-nitroso-L-alanine
Molecular Formula:
C15H20N2O5

Impurity-6

CAS No: 85196-26-5
Chemical Name:
((S)-1-Ethoxy-1-oxo-4-phenylbutan-2-yl)-D-alanine
Molecular Formula:
C15H21NO4

Impurity-2

CAS No: 87679-25-2 130609-48-2 (free base)
Chemical Name:
Benzyl (2S,3aR,6aR)-octahydrocyclopenta[b]pyrrole-2-carboxylate hydrochloride
Molecular Formula:
C15H20ClNO2

Impurity-3

CAS No: 138877-09-5 129101-19-5 (HCl salt)
Chemical Name:
Benzyl (2R,3aR,6aR)-octahydrocyclopenta[b]pyrrole-2-carboxylate hydrochloride
Molecular Formula:
C15H20ClNO2

Impurity-4

CAS No: 84324-12-9
Chemical Name:
N-[(R)-1-Ethoxycarbonyl-3-phenylpropyl]-L-alanine
Molecular Formula:
C15H21NO4

Impurity-5

CAS No: 122076-80-6
Chemical Name:
N-[1-(R)-Ethoxycarbonxyl-3-phenylpropyl)-D-alanine
Molecular Formula:
C15H21NO4

EP impurity I

CAS No: 129939-65-7
Chemical Name:
(2S,3aS,6aS)-1-(((S)-1-ethoxy-1-oxo-4-phenylbutan-2-yl)-D-alanyl)octahydrocyclopenta[b]pyrrole-2-carboxylic acid
Molecular Formula:
C23H32N2O5

EP impurity J

CAS No: 1246253-05-3
Chemical Name:
(2R,3aR,6aR)-1-(((R)-1-ethoxy-1-oxo-4-phenylbutan-2-yl)-D-alanyl)octahydrocyclopenta[b]pyrrole-2-carboxylic acid
Molecular Formula:
C23H32N2O5

EP impurity K

CAS No: 108736-10-3
Chemical Name:
(S)-2-((3S,5aS,8aS,9aS)-3-methyl-1,4-dioxodecahydro-2H-cyclopenta[4,5]pyrrolo[1,2-a]pyrazin-2-yl)-4-phenylbutanoic acid
Molecular Formula:
C21H26N2O4

EP impurity L

CAS No: 1309040-96-7
Chemical Name:
Ethyl (S)-2-((3S,5aS,8aS,9aS)-9a-hydroxy-3-methyl-1,4-dioxodecahydro-2H-cyclopenta[4,5]pyrrolo[1,2-a]pyrazin-2-yl)-4-phenylbutanoate
Molecular Formula:
C23H30N2O5

Impurity-1

CAS No: 94498-85-8
Chemical Name:
Benzyl (2R,3aS,6aS)-octahydrocyclopenta[b]pyrrole-2-carboxylate
Molecular Formula:
C15H19NO2

EP impurity E

CAS No: 87269-97-4
Chemical Name:
(2S,3aS,6aS)-1-(((S)-1-carboxy-3-phenylpropyl)-L-alanyl)octahydrocyclopenta[b]pyrrole-2-carboxylic acid
Molecular Formula:
C21H28N2O5

EP impurity F

CAS No: 82717-96-2
Chemical Name:
((S)-1-ethoxy-1-oxo-4-phenylbutan-2-yl)-L-alanine
Molecular Formula:
C15H21NO4

EP impurity M

CAS No:  2743-38-6
Chemical Name:
(2R,3R)-2,3-bis(benzoyloxy)succinic acid
Molecular Formula:
C18H14O8

EP impurity N

CAS No: NA
Chemical Name:
(2R,3aR,6aR)-1-(((S)-1-ethoxy-1-oxo-4-phenylbutan-2-yl)-L-alanyl)octahydrocyclopenta[b]pyrrole-2-carboxylic acid hydrochloride
Molecular Formula:
C23H32N2O5

EP impurity H

CAS No: 104195-90-6
Chemical Name:
(2S,3aS,6aS)-1-(((R)-1-ethoxy-1-oxo-4-phenylbutan-2-yl)-L-alanyl)octahydrocyclopenta[b]pyrrole-2-carboxylic acid
Molecular Formula:
C23H32N2O5

Bicyclic Acid

CAS No:  80875-98-5
Chemical Name:
(2S,3aS,6aS)-octahydrocyclopenta[b]pyrrole-2-carboxylic acid
Molecular Formula:
C8H13NO2

EP impurity A/USP Related Compound A

CAS No: 108313-11-7
Chemical Name:
(2S,3aS,6aS)-1-(((S)-1-ethoxy-1-oxo-4-phenylbutan-2-yl)-L-alanyl)octahydrocyclopenta[b]pyrrole-2-carboxylic acid
Molecular Formula:
C22H30N2O5

EP impurity B/USP Related Compound B

CAS No: 295328-72-2
Chemical Name:
(2S,3aS,6aS)-1-(((S)-1-isopropoxy-1-oxo-4-phenylbutan-2-yl)-L-alanyl)octahydrocyclopenta[b]pyrrole-2-carboxylic acid
Molecular Formula:
C23H32N2O5

EP impurity C/USP Related Compound C

CAS No: 99742-35-5
Chemical Name:
(2S,3aS,6aS)-1-(((S)-4-cyclohexyl-1-ethoxy-1-oxobutan-2-yl)-L-alanyl)octahydrocyclopenta[b]pyrrole-2-carboxylic acid
Molecular Formula:
C23H38N2O5

EP impurity D/USP Related Compound D

CAS No: 108731-95-9
Chemical Name:
ethyl (S)-2-((3S,5aS,8aS,9aS)-3-methyl-1,4-dioxodecahydro-2H-cyclopenta[4,5]pyrrolo[1,2-a]pyrazin-2-yl)-4-phenylbutanoate
Molecular Formula:
C23H30N2O4

Reference standared

CAS No: 87333-19-5
Chemical Name:
(2S,3aS,6aS)-1-(((S)-1-ethoxy-1-oxo-4-phenylbutan-2-yl)-L-alanyl)octahydrocyclopenta[b]pyrrole-2-carboxylic acid
Molecular Formula:
C23H32N2O5