AIDS-089068 AIDS089068 [3S-[2-[.alpha.S*(1R*,2R*),.gamma.R*(and S*),3.alpha.,4a.beta.,8a.beta.]]-N-[1-[[(1H-Benzimidazol-2-ylmethyl)amino]carbonyl]-2-methylbutyl]-3-[[(1,1-dimethylethyl)amino]carbonyl]decahydro-.gamma.-hydoxy-.gamma.-(hydroxymethyl)-.alpha.-(phenylmethyl)-2-isoquinolinepentamide