(2R/S,3S)-3-[[(N-Benzyloxycarbonyl)asparaginyl]amino]-2-hydroxy-4-phenyl-1-(N-prolylisoleucinylphenylalanine methylamide)butane AIDS-043122 AIDS043122 Cbz-Asn-[Phe-CHOHCH2)-Pro]-Ile-Phe-NHMe