2-Chloro-N-[4-chloro-2-[(hydroxyimino)phenylmethyl]phenyl]acetamide-d5 is the labelled form of 2-Chloro-N-[4-chloro-2-[(hydroxyimino)phenylmethyl]phenyl]acetamide (C364115). 2-Chloro-N-[4-chloro-2-[(hydroxyimino)phenylmethyl]phenyl]acetamide is used in the preparation and antioxidant activity of Quinazoline (Q670100) and 1,4-diazepine derivatives.