4-[[[3-[.beta.-[[(1,1-Dimethylethyl)amino]carbonyl]-.alpha.-methyl-cyclohexylethylamino]-2-hydroxypropyl]amino]carbonyl]-5,5-dimethyl-.alpha.-[(phenylacetyl)amino]-N-(phenylmethyl)-2- AIDS-006813 AIDS006813 Penicillin, cHexMeNH-OHPrNH2 analog