AIDS-045202 AIDS045202 [(5S)-[[N-cyclopentyloxycarbonyl]-.beta.-methanesulfonyl-L-valinyl]amino]-(4R,3S)-epoxy-6-phenyl-hexanoyl]-[(2S)-[1-phenyl-3-methyl]butyl]amide c-Pen-OCO(MeSO2-Val)Phe Epoxy deriv.