irbesartan and its Impurities
Irbesartan is a medication used to treat high blood pressure, heart failure, and diabetic kidney disease. It is sold under the trade name Avapro. It is taken by mouth. Reference standards of Irbesartan API,and its pharmacopeial, non pharmacopeial impurities, and stable isotopes are listed below.

![3-((2'-(1H-Tetrazol-5-yl)-[1,1'-biphenyl]-4-yl)met PA 09 14660](https://www.pharmaffiliates.com/pimages/PA0914660.jpg)
3-((2'-(1H-Tetrazol-5-yl)-[1,1'-biphenyl]-4-yl)methyl)-2-butyl-4-oxo-1,3-diazaspiro[4.4]non-1-ene 1-Oxide
3-((2'-(1H-Tetrazol-5-yl)-[1,1'-biphenyl]-4-yl)methyl)-2-butyl-4-oxo-1,3-diazaspiro[4.4]non-1-ene 1-Oxide
Catalogue No.:PA 09 14660
CAS :
1809097-02-6
Molecular Formula : C25H28N6O2
Molecular Weight : 444.54

![3-((2'-(1H-Tetrazol-5-yl)-[1,1'-biphenyl]-4-yl)met PA 09 14670](https://www.pharmaffiliates.com/pimages/PA0914670.jpg)
3-((2'-(1H-Tetrazol-5-yl)-[1,1'-biphenyl]-4-yl)methyl)-2-butyl-2-methoxy-1,3-diazaspiro[4.4]nonan-4-one
3-((2'-(1H-Tetrazol-5-yl)-[1,1'-biphenyl]-4-yl)methyl)-2-butyl-2-methoxy-1,3-diazaspiro[4.4]nonan-4-one
Catalogue No.:PA 09 14670
CAS :
2204442-81-7
Molecular Formula : C26H32N6O2
Molecular Weight : 460.58


Irbesartan Related Compound A (1-pentanoylamino-cyclopentanecarboxylic acid [2'-(1H-tetrazol-5-yl)- (1347711)
Irbesartan Related Compound A (1-pentanoylamino-cyclopentanecarboxylic acid [2'-(1H-tetrazol-5-yl)- (1347711)
Catalogue No.:PA USP1347711
CAS :
748812-53-5
Molecular Formula : NA
Molecular Weight : NA


2-Butyl-3-((2'-(1-nitroso-1H-tetrazol-5-yl)-[1,1'-biphenyl]-4-yl)methyl)-1,3-diazaspiro[4.4]non-1-en-4-one
2-Butyl-3-((2'-(1-nitroso-1H-tetrazol-5-yl)-[1,1'-biphenyl]-4-yl)methyl)-1,3-diazaspiro[4.4]non-1-en-4-one
Catalogue No.:PA 09 0141005
CAS :
NA
Molecular Formula : C25H27N7O2
Molecular Weight : 457.54

![4'-(2-(3-((2'-Cyano-[1,1'-biphenyl]-4-yl)methyl)-4 PA 09 0141007](https://www.pharmaffiliates.com/pimages/PA090141007.jpg)
4'-(2-(3-((2'-Cyano-[1,1'-biphenyl]-4-yl)methyl)-4-oxo-1,3-diazaspiro[4.4]non-1-en-2-yl)pentyl)-[1,1'-biphenyl]-2-carbonitrile
4'-(2-(3-((2'-Cyano-[1,1'-biphenyl]-4-yl)methyl)-4-oxo-1,3-diazaspiro[4.4]non-1-en-2-yl)pentyl)-[1,1'-biphenyl]-2-carbonitrile
Catalogue No.:PA 09 0141007
CAS :
2512201-51-1
Molecular Formula : C39H36N4O
Molecular Weight : 576.74


4'-((2-Butyl-4,4-dimethyl-5-oxo-4,5-dihydro-1H-imidazol-1-yl)methyl)-[1,1'-biphenyl]-2-carbonitrile
4'-((2-Butyl-4,4-dimethyl-5-oxo-4,5-dihydro-1H-imidazol-1-yl)methyl)-[1,1'-biphenyl]-2-carbonitrile
Catalogue No.:PAI 09 001566
CAS :
141745-64-4
Molecular Formula : C23H25N3O
Molecular Weight : 359.47


1-Pentanamido-N-((2'-(1-trityl-1H-tetrazol-5-yl)-[1,1'-biphenyl]-4-yl)methyl)cyclopentane-1-carboxamide
1-Pentanamido-N-((2'-(1-trityl-1H-tetrazol-5-yl)-[1,1'-biphenyl]-4-yl)methyl)cyclopentane-1-carboxamide
Catalogue No.:PAI 09 001569
CAS :
936102-60-2
Molecular Formula : C44H44N6O2
Molecular Weight : 688.88

![1-((2'-(2H-Tetrazol-5-yl)-[1,1'-biphenyl]-4-yl)met PA 09 0141015](https://www.pharmaffiliates.com/pimages/PA090141015.jpg)
1-((2'-(2H-Tetrazol-5-yl)-[1,1'-biphenyl]-4-yl)methyl)-2-butyl-1,3-diazaspiro[4.4]non-2-en-4-one
1-((2'-(2H-Tetrazol-5-yl)-[1,1'-biphenyl]-4-yl)methyl)-2-butyl-1,3-diazaspiro[4.4]non-2-en-4-one
Catalogue No.:PA 09 0141015
CAS :
2045222-12-4
Molecular Formula : C25H28N6O
Molecular Weight : 428.54