1(2H)-Pyrimidineacetamide,N-[(1S,3S,4S)-4-[[2-(2,6-Dimethylphenoxy)acetyl]amino]-3-hydroxy-5-phenyl-1-(phenylmethyl)pentyl]tetrahydro-.alpha.-(1-methylethyl)-2-oxo-, (alpha.1S)- & {(S)-1-[N'-[(2S,3S)-2-Hydroxy-3-((S)-2-methoxycarbonylamino-3,3-dimethyl-butanoylamino)-4-phenyl-butyl]-N'-(4-pyridin-2-yl-benzyl)-hydrazinocarbonyl]-2,2-dimethyl-propyl}-carbamic acid methyl ester AIDS-069775 AIDS069775 LPV & BMS-232632 Lopinavir & Atazanavir