AIDS-058371 AIDS058371 Cyclic Oxamide Methyl 3-[((6S,5R,7R)-6-hydroxy-4-{[3-(methoxycarbonyl)phenyl]methyl}-2,3-dioxo-5-(2-phenylethyl)-7-benzyl-1,4-diazaperhydroepinyl)methyl]benzoate