atazanavir sulfate and its Impurities
Atazanavir is used in the treatment of HIV. It is an antiretroviral drug of the protease inhibitor (PI) class.. Reference standards of Atazanavir Sulfate API, and its pharmacopeial, non pharmacopeial impurities, and stable isotopes are listed below


(R)-(5S,10S,11S,14S)-11-Benzyl-5,14-di-tert-butyl-3,6,13,16-tetraoxo-8-(4-(pyridin-2-yl)benzyl)-2,17-dioxa-4,7,8,12,15-pentaazaoctadecan-10-yl 2-((methoxycarbonyl)amino)-3,3-dimethylbutanoate
(R)-(5S,10S,11S,14S)-11-Benzyl-5,14-di-tert-butyl-3,6,13,16-tetraoxo-8-(4-(pyridin-2-yl)benzyl)-2,17-dioxa-4,7,8,12,15-pentaazaoctadecan-10-yl 2-((methoxycarbonyl)amino)-3,3-dimethylbutanoate
Catalogue No.:PA 28 30650
CAS :
2131010-71-2
Molecular Formula : C46H65N7O10
Molecular Weight : 876.05


Methyl ((S)-1-(((2S,3S)-4-(((R)-4-(tert-butyl)-2,5-dioxoimidazolidin-1-yl)(4-(pyridin-2-yl)benzyl)amino)-3-hydroxy-1-phenylbutan-2-yl)amino)-3,3-dimethyl-1-oxobutan-2-yl)carbamate
Methyl ((S)-1-(((2S,3S)-4-(((R)-4-(tert-butyl)-2,5-dioxoimidazolidin-1-yl)(4-(pyridin-2-yl)benzyl)amino)-3-hydroxy-1-phenylbutan-2-yl)amino)-3,3-dimethyl-1-oxobutan-2-yl)carbamate
Catalogue No.:PA 28 30660
CAS :
NA
Molecular Formula : C37H48N6O6
Molecular Weight : 672.81


Methyl ((S)-1-(2-((2S,3S)-3-((R)-4-(tert-butyl)-2,5-dioxoimidazolidin-1-yl)-2-hydroxy-4-phenylbutyl)-2-(4-(pyridin-2-yl)benzyl)hydrazinyl)-3,3-dimethyl-1-oxobutan-2-yl)carbamate
Methyl ((S)-1-(2-((2S,3S)-3-((R)-4-(tert-butyl)-2,5-dioxoimidazolidin-1-yl)-2-hydroxy-4-phenylbutyl)-2-(4-(pyridin-2-yl)benzyl)hydrazinyl)-3,3-dimethyl-1-oxobutan-2-yl)carbamate
Catalogue No.:PA 28 30670
CAS :
1292296-13-9
Molecular Formula : C37H48N6O6
Molecular Weight : 672.81


Dimethyl ((3R,6R,7R,15S,16S,19S)-6,16-dibenzyl-7,15-dihydroxy-2,2,20,20-tetramethyl-4,11,18-trioxo-9,13-bis(4-(pyridin-2-yl)benzyl)-5,9,10,12,13,17-hexaazahenicosane-3,19-diyl)dicarbamate
Dimethyl ((3R,6R,7R,15S,16S,19S)-6,16-dibenzyl-7,15-dihydroxy-2,2,20,20-tetramethyl-4,11,18-trioxo-9,13-bis(4-(pyridin-2-yl)benzyl)-5,9,10,12,13,17-hexaazahenicosane-3,19-diyl)dicarbamate
Catalogue No.:PA 28 30680
CAS :
NA
Molecular Formula : C61H76N10O9
Molecular Weight : 1093.32


Atazanavir System Suitability Mixture (A mixture of atazanavir sulfate, atazanavir R, S, S, S,-diastereomer and atazanavir S,R,S,S diastereomer)
Atazanavir System Suitability Mixture (A mixture of atazanavir sulfate, atazanavir R, S, S, S,-diastereomer and atazanavir S,R,S,S diastereomer)
Catalogue No.:PA 28 0301002
CAS :
NA
Molecular Formula : NA
Molecular Weight : NA


Methyl ((5R,10S,11S,14S)-11-benzyl-10-hydroxy-5-isopropyl-15,15-dimethyl-3,6,13-trioxo-8-(4-(pyridin-2-yl)benzyl)-2-oxa-4,7,8,12-tetraazahexadecan-14-yl)carbamate
Methyl ((5R,10S,11S,14S)-11-benzyl-10-hydroxy-5-isopropyl-15,15-dimethyl-3,6,13-trioxo-8-(4-(pyridin-2-yl)benzyl)-2-oxa-4,7,8,12-tetraazahexadecan-14-yl)carbamate
Catalogue No.:PA 28 0301004
CAS :
NA
Molecular Formula : C37H50N6O7
Molecular Weight : 690.84


Tert-butyl 2-((2R,3R)-3-((tert-butoxycarbonyl)amino)-2-hydroxy-4-phenylbutyl)-2-(4-(pyridin-2-yl)benzyl)hydrazine-1-carboxylate
Tert-butyl 2-((2R,3R)-3-((tert-butoxycarbonyl)amino)-2-hydroxy-4-phenylbutyl)-2-(4-(pyridin-2-yl)benzyl)hydrazine-1-carboxylate
Catalogue No.:PA 28 0301005
CAS :
NA
Molecular Formula : C32H42N4O5
Molecular Weight : 562.71


Tert-butyl 2-((2S,3R)-3-((tert-butoxycarbonyl)amino)-2-hydroxy-4-phenylbutyl)-2-(4-(pyridin-2-yl)benzyl)hydrazine-1-carboxylate
Tert-butyl 2-((2S,3R)-3-((tert-butoxycarbonyl)amino)-2-hydroxy-4-phenylbutyl)-2-(4-(pyridin-2-yl)benzyl)hydrazine-1-carboxylate
Catalogue No.:PA 28 0301006
CAS :
NA
Molecular Formula : C32H42N4O5
Molecular Weight : 562.71


Tert-butyl 2-((2R,3S)-3-((tert-butoxycarbonyl)amino)-2-hydroxy-4-phenylbutyl)-2-(4-(pyridin-2-yl)benzyl)hydrazine-1-carboxylate
Tert-butyl 2-((2R,3S)-3-((tert-butoxycarbonyl)amino)-2-hydroxy-4-phenylbutyl)-2-(4-(pyridin-2-yl)benzyl)hydrazine-1-carboxylate
Catalogue No.:PA 28 0301007
CAS :
1006868-81-0
Molecular Formula : C32H42N4O5
Molecular Weight : 562.71


Methyl N-[(2S)-1-[2-[(2S,3S)-3-[[(2S)-2-amino-3,3-dimethylbutanoyl]amino]-2-hydroxy-4-phenylbutyl]-2-[(4-pyridin-2-ylphenyl)methyl]hydrazinyl]-3,3-dimethyl-1-oxobutan-2-yl]carbamate
Methyl N-[(2S)-1-[2-[(2S,3S)-3-[[(2S)-2-amino-3,3-dimethylbutanoyl]amino]-2-hydroxy-4-phenylbutyl]-2-[(4-pyridin-2-ylphenyl)methyl]hydrazinyl]-3,3-dimethyl-1-oxobutan-2-yl]carbamate
Catalogue No.:PA 28 0301008
CAS :
1192224-26-2
Molecular Formula : C36H50N6O5
Molecular Weight : 646.83


Methyl ((S)-1-(2-((2S,3S)-3-amino-2-hydroxy-4-phenylbutyl)-2-(4-(pyridin-2-yl)benzyl)hydrazinyl)-3,3-dimethyl-1-oxobutan-2-yl)carbamate
Methyl ((S)-1-(2-((2S,3S)-3-amino-2-hydroxy-4-phenylbutyl)-2-(4-(pyridin-2-yl)benzyl)hydrazinyl)-3,3-dimethyl-1-oxobutan-2-yl)carbamate
Catalogue No.:PA 28 0301009
CAS :
857900-54-0
Molecular Formula : C30H39N5O4
Molecular Weight : 533.67


Methyl ((5S,10S,11S,14S)-11-benzyl-10-hydroxy-5-isopropyl-15,15-dimethyl-3,6,13-trioxo-8-(4-(pyridin-2-yl)benzyl)-2-oxa-4,7,8,12-tetraazahexadecan-14-yl)carbamate
Methyl ((5S,10S,11S,14S)-11-benzyl-10-hydroxy-5-isopropyl-15,15-dimethyl-3,6,13-trioxo-8-(4-(pyridin-2-yl)benzyl)-2-oxa-4,7,8,12-tetraazahexadecan-14-yl)carbamate
Catalogue No.:PA 28 0301011
CAS :
198904-33-5
Molecular Formula : C37H50N6O7
Molecular Weight : 690.84