N-(4-chloro-2-((hydroxyimino)(phenyl)methyl) phenyl)-2-(methylamino)acetamide

N-(4-Chloro-2-((hydroxyimino)(phenyl)methyl)phenyl)-2-(methylamino)acetamide is a structurally complex oxime-derived aromatic amide featuring a 4-chlorophenyl ring substituted at the 2-position by a benzylidene hydroxyimino group and an acetamide side chain bearing a methylamino moiety. The molecule incorporates a conjugated aromatic system with electron-withdrawing chloro substituent, a Z/E-configurational hydroxyimino bridge, and a secondary amine in the acylamino terminus. This impurity arises from nucleophilic attack of methylamine on a benzaldehyde oxime intermediate during parent drug synthesis. Functions as a critical HPLC reference standard for monitoring synthetic pathway fidelity.