2-Piperidinecarboxamide, N-(1,1-dimethylethyl)-1-[(2R,3S)-2-hydroxy-3-[[(2S)-3-methyl-2-[[[methyl[[2-(1-methylethyl)-4-thiazolyl]methyl]amino]carbonyl]amino]-1-oxobutyl]amino]-4-phenylbutyl]-4-(5-thiazolylmethoxy)-, (2S,4R)- AIDS-109510 AIDS109510