4-[[[3-[4-[[(1,1-Dimethylethyl)amino]carbonyl]-3-thiazolidinyl]-2-hydroxypropyl]amino]carbonyl]-5,5-dimethyl-.alpha.-[(phenylacetyl)amino]-N-(phenylmethyl)-2-thiazolidineacetamide, [2R-[2.alpha.(R*) AIDS-006801 AIDS006801 Penicillin, 3Thiazol-OHPrNH2 analog