(2S,3S)-2-(2-{2-[(2S,3R)-3-((S)-1-{(S)-3-Carbamoyl-2-[(1-quinolin-2-yl-methanoyl)-amino]-propanoylamino}-2-phenyl-ethyl)-oxiranyl]-ethanoylamino}-ethanoylamino)-3-methyl-pentanoic acid AIDS-070507 AIDS070507 Qc-Asn-Phe- .psi.[(R,S)-cis-epoxide]Gly-Ile