(2R,4S)-5-((3S,5R)-3,5-Dibenzyl-2-oxo-pyrrolidin-1-yl)-4-hydroxy-2-{4-[2-(4-methyl-piperazin-1-yl)-2-oxo-ethoxy]-benzyl}-pentanoic acid ((1S,2R)-2-hydroxy-indan-1-yl)-amide AIDS-224373 AIDS224373