4-[[[3-[2-[[(1,1-Dimethylethyl)amino]carbonyl]-4-(phenoxycarbonyl)-1-piperazinyl]-2(S)-hydroxypropyl]amino]carbonyl]-5,5-dimethyl-.alpha.-[(phenylacetyl)amino]-N-(phenylmethyl)-2- AIDS-006809 AIDS006809 Penicillin, 1Piperaz-OHPrNH2 analog