(S)-1-[(2S,4R)-5-(1,2-Dihydro-pyridin-4-yl)-2-hydroxy-4-((1S,2R)-2-hydroxy-indan-1-ylcarbamoyl)-pentyl]-4-pyridin-3-ylmethyl-piperazine-2-carboxylic acid tert-butylamide AIDS-059355 AIDS059355 Bis-pyridyl analog