AIDS-006595 AIDS006595 Val Imid HOEt isostere [1-[[[2-Hydroxy-4-[4-(1-methylethyl)-1H-imidazol-2-yl]-5-phenyl-1-(phenylmethyl)pentyl]amino]carbonyl]-2-methylpropyl]carbamic acid, ethyl ester, [1S-[1R*(R*),2R*,4S*]]