1 74M Methyl N-({(2s,3s)-3-[(propylamino)carbonyl]oxiran-2-yl}carbonyl)-L-isoleucyl-L-prolinate 1.000 2 73V Benzyl N-({(2s,3s)-3-[(propylamino)carbonyl]oxiran-2-yl}carbonyl)-L-isoleucyl-L-prolinate 0.824