Vibegron and its Impurities
Vibegron, sold under the brand name Gemtesa, is a medication for the treatment of overactive bladder. Reference standards of Vibegron API, and its pharmacopeial, non pharmacopeial impurities, and stable isotopes are listed below.


(S)-N-(4-(((2R,5S)-5-((R)-Hydroxy(phenyl)methyl)-1-nitrosopyrrolidin-2-yl)methyl)phenyl)-4-oxo-4,6,7,8-tetrahydropyrrolo[1,2-a]pyrimidine-6-carboxamide
(S)-N-(4-(((2R,5S)-5-((R)-Hydroxy(phenyl)methyl)-1-nitrosopyrrolidin-2-yl)methyl)phenyl)-4-oxo-4,6,7,8-tetrahydropyrrolo[1,2-a]pyrimidine-6-carboxamide
Catalogue No.:PA 22 1021001
CAS :
NA
Molecular Formula : C26H27N5O4
Molecular Weight : 473.53


(S)-N-(4-(((2R,5R)-5-((R)-Hydroxy(phenyl)methyl)pyrrolidin-2-yl)methyl)phenyl)-4-oxo-4,6,7,8-tetrahydropyrrolo[1,2-a]pyrimidine-6-carboxamide
(S)-N-(4-(((2R,5R)-5-((R)-Hydroxy(phenyl)methyl)pyrrolidin-2-yl)methyl)phenyl)-4-oxo-4,6,7,8-tetrahydropyrrolo[1,2-a]pyrimidine-6-carboxamide
Catalogue No.:PA 22 1021003
CAS :
NA
Molecular Formula : C26H28N4O3
Molecular Weight : 444.54


(S)-N-(4-(((2R,5R)-5-((S)-Hydroxy(phenyl)methyl)pyrrolidin-2-yl)methyl)phenyl)-4-oxo-4,6,7,8-tetrahydropyrrolo[1,2-a]pyrimidine-6-carboxamide
(S)-N-(4-(((2R,5R)-5-((S)-Hydroxy(phenyl)methyl)pyrrolidin-2-yl)methyl)phenyl)-4-oxo-4,6,7,8-tetrahydropyrrolo[1,2-a]pyrimidine-6-carboxamide
Catalogue No.:PA 22 1021004
CAS :
NA
Molecular Formula : C26H28N4O3
Molecular Weight : 444.54


(S)-N-(4-(((2S,5R)-5-((S)-Hydroxy(phenyl)methyl)pyrrolidin-2-yl)methyl)phenyl)-4-oxo-4,6,7,8-tetrahydropyrrolo[1,2-a]pyrimidine-6-carboxamide
(S)-N-(4-(((2S,5R)-5-((S)-Hydroxy(phenyl)methyl)pyrrolidin-2-yl)methyl)phenyl)-4-oxo-4,6,7,8-tetrahydropyrrolo[1,2-a]pyrimidine-6-carboxamide
Catalogue No.:PA 22 1021005
CAS :
NA
Molecular Formula : C26H28N4O3
Molecular Weight : 444.54


(S)-N-(4-(((2S,5S)-5-((R)-Hydroxy(phenyl)methyl)pyrrolidin-2-yl)methyl)phenyl)-4-oxo-4,6,7,8-tetrahydropyrrolo[1,2-a]pyrimidine-6-carboxamide
(S)-N-(4-(((2S,5S)-5-((R)-Hydroxy(phenyl)methyl)pyrrolidin-2-yl)methyl)phenyl)-4-oxo-4,6,7,8-tetrahydropyrrolo[1,2-a]pyrimidine-6-carboxamide
Catalogue No.:PA 22 1021006
CAS :
NA
Molecular Formula : C26H28N4O3
Molecular Weight : 444.54


(S)-N-(4-(((2S,5S)-5-((S)-Hydroxy(phenyl)methyl)pyrrolidin-2-yl)methyl)phenyl)-4-oxo-4,6,7,8-tetrahydropyrrolo[1,2-a]pyrimidine-6-carboxamide
(S)-N-(4-(((2S,5S)-5-((S)-Hydroxy(phenyl)methyl)pyrrolidin-2-yl)methyl)phenyl)-4-oxo-4,6,7,8-tetrahydropyrrolo[1,2-a]pyrimidine-6-carboxamide
Catalogue No.:PA 22 1021007
CAS :
NA
Molecular Formula : C26H28N4O3
Molecular Weight : 444.54


(6S)-4-Hydroperoxy-N-(4-(((2R,5R)-5-((R)-hydroxy(phenyl)methyl)pyrrolidin-2-yl)methyl)phenyl)-4,6,7,8-tetrahydropyrrolo[1,2-a]pyrimidine-6-carboxamide
(6S)-4-Hydroperoxy-N-(4-(((2R,5R)-5-((R)-hydroxy(phenyl)methyl)pyrrolidin-2-yl)methyl)phenyl)-4,6,7,8-tetrahydropyrrolo[1,2-a]pyrimidine-6-carboxamide
Catalogue No.:PA 22 1021012
CAS :
NA
Molecular Formula : C26H30N4O4
Molecular Weight : 462.55


(S)-N-(4-(((2S,5R)-5-((R)-Hydroxy(phenyl)methyl)-1-nitrosopyrrolidin-2-yl)methyl)phenyl)-4-oxo-4,6,7,8-tetrahydropyrrolo[1,2-a]pyrimidine-6-carboxamide
(S)-N-(4-(((2S,5R)-5-((R)-Hydroxy(phenyl)methyl)-1-nitrosopyrrolidin-2-yl)methyl)phenyl)-4-oxo-4,6,7,8-tetrahydropyrrolo[1,2-a]pyrimidine-6-carboxamide
Catalogue No.:PA 22 1021016
CAS :
NA
Molecular Formula : C26H27N5O4
Molecular Weight : 473.53


(R)-N-(4-(((2R,5S)-5-((S)-Hydroxy(phenyl)methyl)pyrrolidin-2-yl)methyl)phenyl)-4-oxo-4,6,7,8-tetrahydropyrrolo[1,2-a]pyrimidine-6-carboxamide
(R)-N-(4-(((2R,5S)-5-((S)-Hydroxy(phenyl)methyl)pyrrolidin-2-yl)methyl)phenyl)-4-oxo-4,6,7,8-tetrahydropyrrolo[1,2-a]pyrimidine-6-carboxamide
Catalogue No.:PA 22 1021017
CAS :
NA
Molecular Formula : C26H28N4O3
Molecular Weight : 444.54


(S)-N-(4-(((2R,5S)-5-((R)-Hydroxy(phenyl)methyl)pyrrolidin-2-yl)methyl)phenyl)-4-oxo-4,6,7,8-tetrahydropyrrolo[1,2-a]pyrimidine-6-carboxamide
(S)-N-(4-(((2R,5S)-5-((R)-Hydroxy(phenyl)methyl)pyrrolidin-2-yl)methyl)phenyl)-4-oxo-4,6,7,8-tetrahydropyrrolo[1,2-a]pyrimidine-6-carboxamide
Catalogue No.:PA 22 1021018
CAS :
NA
Molecular Formula : C26H28N4O3
Molecular Weight : 444.54


(R)-N-(4-(((2S,5S)-5-((R)-Hydroxy(phenyl)methyl)pyrrolidin-2-yl)methyl)phenyl)-4-oxo-4,6,7,8-tetrahydropyrrolo[1,2-a]pyrimidine-6-carboxamide
(R)-N-(4-(((2S,5S)-5-((R)-Hydroxy(phenyl)methyl)pyrrolidin-2-yl)methyl)phenyl)-4-oxo-4,6,7,8-tetrahydropyrrolo[1,2-a]pyrimidine-6-carboxamide
Catalogue No.:PA 22 1021019
CAS :
NA
Molecular Formula : C26H28N4O3
Molecular Weight : 444.54