1(2H)-Pyrimidineacetamide, tetrahydro-N-[(1S,3S,4S)-3-hydroxy-4-[[2-(2-methylphenoxy)acetyl]amino]-5-phenyl-1-(phenylmethyl)pentyl]-.alpha.-(1-methylethyl)-2-oxo-, (a1S)- AIDS-121162 AIDS121162