127231-49-6 (S-(R*,R*)) 127306-20-1 (R-(R*,S*)) 137328-41-7 AIDS-000854 AIDS000854 Ac-Leu-Asn-[Leu-HEA-Pro]-Ile-Val-OMe L-Valine, N-[N-[1-[3-[[N2-(N-acetyl-L-leucyl)-L-asparaginyl]amino]-2-hydroxy-5-methylhexyl]-L-prolyl]-L-isoleucyl]-, methyl ester