(2R/S,3R)-3-[[N-(2-Quinolinylcarbonyl)asparaginyl]amino]-2-hydroxy-4-phenyl-1-(N-prolylisoleucinylphenylalaninemethylester)butane AIDS-043120 AIDS043120 Qua-Asn-[Phe-CHOHCH2)-Pro]-Ile-Phe-OMe