(1-{(1S,2R,4S)-1-Benzyl-2,3-dihydroxy-4-[3-methyl-2-(pyridin-4-ylmethoxycarbonylamino)-butanoylamino]-5-phenyl-pentylcarbamoyl}-2-methyl-propyl)-carbamic acid pyridin-4-ylmethyl ester AIDS-045724 AIDS045724 Diol-based HIV Protease inhibitor Derivative