PRODUCT CATALOG
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Leflunomide
Human API
Characterised impurities
| Impurity | Chemical name | Pharmacopoeia |
|---|---|---|
| Impurity “B” | (2Z)-2-Cyano-3- hydroxy-N- [4(Trifluoromethyl) phenyl]but-2- enamide | BP/US P |
| Impurity “C” | 5-Methyl-N-[3- (trifluoromethyl)phe nyl]-4- isoxazolecarboxamid | BP/US P |
| Leo ester half cyclized | Ethyl 6,7,8-trifluoro- 1,4-dihydro-1-((S)-1- hydroxy propan-2- yl)-4-oxo-quinoline- 3-carboxylate; half cycle ester Ethyl (S,Z)-3-((1- | IHT |
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