(2S,4R)-1-{(2R,3S)-3-[2-(2,6-Dimethyl-phenoxy)-ethanoylamino]-2-hydroxy-4-phenyl-butyl}-4-(2,6-dimethyl-pyrimidin-4-ylsulfanyl)-piperidine-2-carboxylic acid tert-butylamide AIDS-088847 AIDS088847