enzalutamide and its Impurities
Enzalutamide, sold under the brand name Xtandi. It is a nonsteroidal antiandrogen medication which is used in the treatment of prostate cancer.. Reference standards of Enzalutamide API, and its pharmacopeial, non pharmacopeial impurities, and stable isotopes are listed below


4-(3-(4-Cyano-3-(trifluoromethyl)phenyl)-5,5-dimethyl-2,4-dioxoimidazolidin-1-yl)-2-fluoro-N-methylbenzamide
4-(3-(4-Cyano-3-(trifluoromethyl)phenyl)-5,5-dimethyl-2,4-dioxoimidazolidin-1-yl)-2-fluoro-N-methylbenzamide
Catalogue No.:PA 05 55510
CAS :
1242137-18-3
Molecular Formula : C21H16F4N4O3
Molecular Weight : 448.37


4-(3-(4-Cyano-3-(trifluoromethyl)phenyl)-5,5-dimethyl-4-oxo-2-thioxoimidazolidin-1-yl)-N-methylbenzamide
4-(3-(4-Cyano-3-(trifluoromethyl)phenyl)-5,5-dimethyl-4-oxo-2-thioxoimidazolidin-1-yl)-N-methylbenzamide
Catalogue No.:PA 05 55520
CAS :
915087-16-0
Molecular Formula : C21H17F3N4O2S
Molecular Weight : 446.45

![4-[[2-[[4-Cyano-3-(trifluoromethyl)phenyl]amino]-1 PA 05 55650](https://www.pharmaffiliates.com/pimages/PA0555650.jpg)
4-[[2-[[4-Cyano-3-(trifluoromethyl)phenyl]amino]-1,1-dimethyl-2-oxoethyl]amino]-2-fluoro-N-methyl-benzamide
4-[[2-[[4-Cyano-3-(trifluoromethyl)phenyl]amino]-1,1-dimethyl-2-oxoethyl]amino]-2-fluoro-N-methyl-benzamide
Catalogue No.:PA 05 55650
CAS :
1289942-55-7
Molecular Formula : C20H18F4N4O2
Molecular Weight : 422.38


N-(4-Cyano-3-(trifluoromethyl)phenyl)-4-(3-(4-cyano-3-(trifluoromethyl)phenyl)-5,5-dimethyl-4-oxo-2-thioxoimidazolidin-1-yl)-2-fluorobenzamide
N-(4-Cyano-3-(trifluoromethyl)phenyl)-4-(3-(4-cyano-3-(trifluoromethyl)phenyl)-5,5-dimethyl-4-oxo-2-thioxoimidazolidin-1-yl)-2-fluorobenzamide
Catalogue No.:PA 05 0551005
CAS :
3035510-32-5
Molecular Formula : C28H16F7N5O2S
Molecular Weight : 619.52


4-(3-(1-(4-Cyano-3-(trifluoromethyl)phenyl)-3-methyl-4-oxo-2-thioxo-1,2,3,4-tetrahydroquinazolin-7-yl)-4,4-dimethyl-5-oxo-2-thioxoimidazolidin-1-yl)-2-(trifluoromethyl)benzonitrile
4-(3-(1-(4-Cyano-3-(trifluoromethyl)phenyl)-3-methyl-4-oxo-2-thioxo-1,2,3,4-tetrahydroquinazolin-7-yl)-4,4-dimethyl-5-oxo-2-thioxoimidazolidin-1-yl)-2-(trifluoromethyl)benzonitrile
Catalogue No.:PA 05 0551006
CAS :
2810090-73-2
Molecular Formula : C30H18F6N6O2S2
Molecular Weight : 672.62


4-(3-(4-Cyano-3-(trifluoromethyl)phenyl)-2-hydroperoxy-5,5-dimethyl-4-oxoimidazolidin-1-yl)-2-fluoro-N-methylbenzamide
4-(3-(4-Cyano-3-(trifluoromethyl)phenyl)-2-hydroperoxy-5,5-dimethyl-4-oxoimidazolidin-1-yl)-2-fluoro-N-methylbenzamide
Catalogue No.:PA 05 0551007
CAS :
NA
Molecular Formula : C21H18F4N4O4
Molecular Weight : 466.39


4-(3-(4-cyano-3-(trifluoromethyl)phenyl)-5,5-dimethyl-2,4-dioxoimidazolidin-1-yl)-2-fluorobenzoic acid
4-(3-(4-cyano-3-(trifluoromethyl)phenyl)-5,5-dimethyl-2,4-dioxoimidazolidin-1-yl)-2-fluorobenzoic acid
Catalogue No.:PA 05 0551008
CAS :
1242137-19-4
Molecular Formula : C20H13F4N3O4
Molecular Weight : 435.33


Methyl 4-(3-(4-cyano-3-(trifluoromethyl)phenyl)-5,5-dimethyl-4-oxo-2-thioxoimidazolidin-1-yl)-2-fluorobenzoate
Methyl 4-(3-(4-cyano-3-(trifluoromethyl)phenyl)-5,5-dimethyl-4-oxo-2-thioxoimidazolidin-1-yl)-2-fluorobenzoate
Catalogue No.:PA 05 0551009
CAS :
1802242-43-8
Molecular Formula : C21H15F4N3O3S
Molecular Weight : 465.42


4-(3-(4-Cyano-3-(trifluoromethyl)phenyl)-5,5-bis(methyl-d3)-4-oxo-2-thioxoimidazolidin-1-yl)-2-fluorobenzoic acid
4-(3-(4-Cyano-3-(trifluoromethyl)phenyl)-5,5-bis(methyl-d3)-4-oxo-2-thioxoimidazolidin-1-yl)-2-fluorobenzoic acid
Catalogue No.:PA STI 088989
CAS :
2746238-00-4
Molecular Formula : C20H7D6F4N3O3S
Molecular Weight : 457.43


4-(4-((4-Cyano-3-(trifluoromethyl)phenyl)amino)-3,3-dimethyl-1,4-dioxobutan-2-yl)-2-fluoro-N-methylbenzamide
4-(4-((4-Cyano-3-(trifluoromethyl)phenyl)amino)-3,3-dimethyl-1,4-dioxobutan-2-yl)-2-fluoro-N-methylbenzamide
Catalogue No.:PA 05 0551017
CAS :
NA
Molecular Formula : C22H19F4N3O3
Molecular Weight : 449.41


4-(3-(4-Cyano-3-(trifluoromethyl)phenyl)-5,5-dimethyl-4-oxo-2-thioxoimidazolidin-1-yl)-N-methyl-2-(methylamino)benzamide
4-(3-(4-Cyano-3-(trifluoromethyl)phenyl)-5,5-dimethyl-4-oxo-2-thioxoimidazolidin-1-yl)-N-methyl-2-(methylamino)benzamide
Catalogue No.:PA 05 0551018
CAS :
NA
Molecular Formula : C22H20F3N5O2S
Molecular Weight : 475.49


Ethyl 4-((1-((4-cyano-3-(trifluoromethyl)phenyl)amino)-2-methyl-1-oxopropan-2-yl)amino)-2-fluorobenzoate
Ethyl 4-((1-((4-cyano-3-(trifluoromethyl)phenyl)amino)-2-methyl-1-oxopropan-2-yl)amino)-2-fluorobenzoate
Catalogue No.:PA 05 0551023
CAS :
2463603-98-5
Molecular Formula : C21H19F4N3O3
Molecular Weight : 437.39


Ethyl 4-(3-(4-cyano-3-(trifluoromethyl)phenyl)-5,5-dimethyl-4-oxo-2-thioxoimidazolidin-1-yl)-2-fluorobenzoate
Ethyl 4-(3-(4-cyano-3-(trifluoromethyl)phenyl)-5,5-dimethyl-4-oxo-2-thioxoimidazolidin-1-yl)-2-fluorobenzoate
Catalogue No.:PA 05 0551030
CAS :
1802242-44-9
Molecular Formula : C22H17F4N3O3S
Molecular Weight : 479.45


4-(N-(1-((4-Cyano-3-(trifluoromethyl)phenyl)amino)-2-methyl-1-oxopropan-2-yl)formamido)-2-fluoro-N-methylbenzamide
4-(N-(1-((4-Cyano-3-(trifluoromethyl)phenyl)amino)-2-methyl-1-oxopropan-2-yl)formamido)-2-fluoro-N-methylbenzamide
Catalogue No.:PA 05 0551032
CAS :
3035510-40-5
Molecular Formula : C21H18F4N4O3
Molecular Weight : 450.39


4-((1-((4-Cyano-3-(trifluoromethyl)phenyl)amino)-2-methyl-1-oxopropan-2-yl)(nitroso)amino)-2-fluoro-N-methylbenzamide
4-((1-((4-Cyano-3-(trifluoromethyl)phenyl)amino)-2-methyl-1-oxopropan-2-yl)(nitroso)amino)-2-fluoro-N-methylbenzamide
Catalogue No.:PA 05 0551037
CAS :
NA
Molecular Formula : C20H17F4N5O3
Molecular Weight : 451.38


4-(3-(4-Cyano-3-(trifluoromethyl)phenyl)-2-hydroxy-5,5-dimethyl-4-oxoimidazolidin-1-yl)-2-fluoro-N-methylbenzamide
4-(3-(4-Cyano-3-(trifluoromethyl)phenyl)-2-hydroxy-5,5-dimethyl-4-oxoimidazolidin-1-yl)-2-fluoro-N-methylbenzamide
Catalogue No.:PA 05 0551040
CAS :
2029195-97-7
Molecular Formula : C21H18F4N4O3
Molecular Weight : 450.39


4-(3-(4-Cyano-3-(trifluoromethyl)phenyl)-5,5-dimethyl-2,4-dioxoimidazolidin-1-yl)-2-fluorobenzamide
4-(3-(4-Cyano-3-(trifluoromethyl)phenyl)-5,5-dimethyl-2,4-dioxoimidazolidin-1-yl)-2-fluorobenzamide
Catalogue No.:PA 05 0551043
CAS :
1242137-17-2
Molecular Formula : C20H14F4N4O3
Molecular Weight : 434.35


(E)-4-(3-(4-Cyano-3-(trifluoromethyl)phenyl)-4-(((4-cyano-3-(trifluoromethyl)phenyl)carbamothioyl)imino)-5,5-dimethyl-2-thioxoimidazolidin-1-yl)-2-fluoro-N-methylbenzamide
(E)-4-(3-(4-Cyano-3-(trifluoromethyl)phenyl)-4-(((4-cyano-3-(trifluoromethyl)phenyl)carbamothioyl)imino)-5,5-dimethyl-2-thioxoimidazolidin-1-yl)-2-fluoro-N-methylbenzamide
Catalogue No.:PA 05 0551049
CAS :
NA
Molecular Formula : C30H20F7N7OS2
Molecular Weight : 691.65