(2S,4S,5S)-5-(3,3-Dimethyl-butanoylamino)-4-hydroxy-2-isopropyl-7-methyloctanoic acid {(1S,2S)-2-methyl-1-[(pyridin-2-ylmethyl)carbamoyl]-butyl}-amide AIDS-081468 AIDS081468 TBA-LVA-Ile-Amp