2-[2-(2’,6’-Dichloro-4’-hydroxphenylamino)phenyl-d4]-N,N-dimethylacetamide is an intermediate in the synthesis of 4’-Hydroxy Diclofenac-d4 (H825227), is an isotope labeled metabolite of Diclofenac, a nonsteroidal inflammatory compound and cyclooxygenase (COX) inhibitor.