N-(Methoxycarbonyl)-3-methyl-L-valine 2-[(2S,3S)-3-Amino-2-hydroxy-4-phenylbutyl]-2-[[4-(2-pyridinyl)phenyl]methyl]hydrazide Hydrochloride is an intermediate in synthesizing Atazanavir-d9 (A790053). It is the deuterated analog of Atazanavir (A790051), a azapeptide HIV protease inhibitor derivative. Atazanavir have been investigated as potential treatment of human immunodeficiency virus (HIV) and for anticancer purposes.