667904-94-1

N,N''-2-Hydroxy-1,4-bis(phenylmethyl)-2,6-dimethylphenoxy)acetamide is a by-product from the synthesis of (αS)-3-[2-(2,6-Dimethylphenoxy)acetyl]-N-[(1S,3S,4S)-4-[[2-(2,6-dimethylphenoxy)acetyl]amino]-3-hydroxy-5-phenyl-1-(phenylmethyl)pentyl]tetrahydro-α-(1-methylethyl)-2-oxo-1(2H)-pyrimidineacetamide (Lopinavir EP Impurity R) (D476505), an impurity of Lopinavir (L469480), a selective HIV protease inhibitor.