1-{(2S,3S)-3-[(N-Acetyl-L-leucyl-L-asparaginyl)amino]-2-hydroxy-4-phenylbutyl}-L-prolyl-L-isoleucyl-L-valinamide AIDS-045700 AIDS045700 Acetyl-Leu-Asn-Phe-[CHOHCH2]-Pro-Ile-Val-NH2, S isomer