(2S,3S)-3-[(N-Benzyloxycarbonyl)-L-asparaginyl]amino]-2-hydroxy-4-phenyl-1-(N-(L-prolyl-L-isoleucinyl-L-phenylalanine methyl ester))butane AIDS-043118 AIDS043118 Cbz-Asn-Phe-psi-[(S)-CHOHCH2)-Pro]-Ile-Phe-OMe