(1-{(1S,2R,4S)-1-Benzyl-2,3-dihydroxy-4-[3-methyl-2-(pyridin-2-ylmethoxycarbonylamino)-butanoylamino]-5-phenyl-pentylcarbamoyl}-2-methyl-propyl)-carbamic acid pyridin-2-ylmethyl ester AIDS-045716 AIDS045716 Diol-based HIV Protease inhibitor Derivative