(S)-2-Acetylamino-N1-((1S,2S,4S)-2-hydroxy-1-isobutyl-5-methyl-4-{(1S,2S)-2-methyl-1-[(pyridin-2-ylmethyl)carbamoyl]butylcarbamoyl}-hexyl)succinamide AIDS-081477 AIDS081477 Ac-Asn-LVA-Ile-Amp