Following the procedure described for the preparation of 4-methoxy-N-((1S)-1-{[((1S)-3-methoxy-2-oxo-1-{[(3S)-2-oxopyrrolidin-3-yl]methyl}propyl)amino]carbonyl}-4-methylpentyl)-1H-indole-2-carboxamide but substituting N1-((1S)-3-hydroxy-2-oxo-1-{[(3S)-2-oxopyrrolidin-3-yl]methyl}propyl)-4-methyl-N2-[(2R)-tetrahydrofuran-2-ylcarbonyl]-l-leucinamide and making noncritical variations provided a crude product.