Impurity Standards

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Entacapone EP Impurity C

Product Code:
DH/ENT/1003
Molecular Formula:
C7H5N05
CAS Number:
116313-85-0
Molecular Weight:
183.12
Synonyms: 3,4-Dihydroxy-5-nitrobenzaldehyde


Entacapone EP Impurity D

Product Code:
DH/ENT/1004
Molecular Formula:
C16H19N3O5
CAS Number:
857629-79-9
Molecular Weight:
333.34
Synonyms: (2E)-2-Cyano-3-(3-ethoxy-4-hydroxy-5-nitrophenyl)-N,N-diethyl-2-propenamide


Entacapone EP Impurity E

Product Code:
DH/ENT/1005
Molecular Formula:
C6H4N2O6
CAS Number:
7659-29-2
Molecular Weight:
200.11
Synonyms: 1,2-Dihydroxy-3,5-dinitrobenzene


Entacapone EP Impurity F

Product Code:
DH/ENT/1006
Molecular Formula:
C10H6N2O6
CAS Number:
160391-70-8
Molecular Weight:
250.16
Synonyms: (2E)-2-Cyano-3-(3,4-dihydroxy-5-nitrophenyl)prop-2-enoic acid


Entacapone EP Impurity G

Product Code:
DH/ENT/1007
Molecular Formula:
C11H9N3O5
CAS Number:
1364322-41-7
Molecular Weight:
263.21
Synonyms: (2E)-2-Cyano-3-(3,4-dihydroxy-5-nitrophenyl)-N-methyl-prop-2-enamide


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