Following the procedure described for the preparation of N-{(1S)-1-(cyclohexylmethyl)-2-[((1S)-3-hydroxy-2-oxo-1-{[(3S)-2-oxopyrrolidin-3-yl]methyl}propyl)amino]-2-oxoethyl}-4-methoxy-1H-indole-2-carboxamide but substituting N-((1S)-1-{[((1S)-3-(benzyloxy)-2-oxo-1-{[(3S)-2-oxopyrrolidin-3-yl]methyl}propyl)amino]carbonyl}-3-methylbutyl)-4-methoxy-N-methyl-1H-indole-2-carboxamide and making noncritical variations provided a crude clear glass.