1-Cyclohexyl-2-[[N-(ethoxycarbonyl)-L-valinyl]amino]-4(S)-hydroxy-5(S)-[[N-(quinolin-2-ylcarbonyl)-L-asparaginyl]amino]-6-phenyl-2-azahexane AIDS-030855 AIDS030855 bis-Val HOEt-N2 aza-peptide isostere