Nilutamide EP Impurity C

Nilutamide EP Impurity C is a structurally related byproduct arising from the synthetic pathway of Nilutamide, characterized by a substituted phthalimide core with a trifluoromethyl group and a nitro-substituted aromatic ring. Its molecular architecture incorporates a conjugated diene system, an amide linkage, and three fluorine atoms integrated into the aromatic framework. The compound exhibits a unique combination of electron-withdrawing fluorine substituents and nitro functionality, which differentiates it from the parent drug by altering the regiochemistry of key synthetic intermediates. This impurity is formed via side-chain oxidation during phthalimide ring formation. This compound serves as an HPLC reference standard for quantifying Nilutamide EP Impurity C in pharmaceutical quality control.