(2S,3S)-2-({1-[(S)-1-((R)-4-{(1S,2S)-1-[(1H-Benzimidazol-2-ylmethyl)-carbamoyl]-2-methyl-butylcarbamoyl}-2-hydroxy-5-phenyl-pentyl)-pyrrolidin-2-yl]-methanoyl}-amino)-3-methyl-pentanoic acid tert-butyl ester AIDS-112405 AIDS112405