(2S,4S,5S)-5-((S)-2-Acetylamino-3-methyl-butanoylamino)-4-hydroxy-2-isopropyl-7-methyloctanoic acid {(1S,2S)-2-methyl-1-[(pyridin-2-ylmethyl)carbamoyl]-butyl}-amide AIDS-081475 AIDS081475 Ac-Val-LVA-Ile-Amp