Impurity Standards

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Darifenacin Carboxylic Acid Impurity

Product Code:
DH /DFN/1005
Molecular Formula:
C28H29NO3
CAS Number:
NA
Molecular Weight:
427.53
Synonyms: (S)-2-(1-(2-(2,3-Dihydrobenzofuran-5-yl)ethyl)pyrrolidin-3-yl)-2,2-diphenylacetic acid


Darifenacin Dehydro Impurity

Product Code:
DH /DFN/1006
Molecular Formula:
C28H29BrN2O2
CAS Number:
943034-52-4
Molecular Weight:
505.45
Synonyms: (S)-2-[1-[2-(Benzfuran-5-yl)ethyl]-3-pyrrolidinyl]-2,2-diphenylacetamide HBr


Darifenacin Vinyl Impurity

Product Code:
DH /DFN/1007
Molecular Formula:
C28H30N2O2
CAS Number:
1048979-09-4
Molecular Weight:
426.55
Synonyms: (3S)-1-[2-(3-Ethenyl-4-hydroxyphenyl)ethyl]-α,α-diphenyl-3-pyrrolidineacetamide


Dexamethasone EP Impurity A

Product Code:
DH /DXN/1001
Molecular Formula:
C22H29FO5
CAS Number:
NA
Molecular Weight:
392.46
Synonyms: : 14-Fluoro-11β,17,21-trihydroxy-16α-methylpregna-1,4-diene-3,20-dione


Dexamethasone EP Impurity B

Product Code:
DH /DXN/1002
Molecular Formula:
C22H29FO5
CAS Number:
378-44-9
Molecular Weight:
392.46
Synonyms: 9-Fluoro-11β,17,21-trihydroxy-16β-methylpregna-1,4-diene-3,20-dione


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