1 73V Benzyl N-({(2s,3s)-3-[(propylamino)carbonyl]oxiran-2-yl}carbonyl)-L-isoleucyl-L-prolinate 1.000 2 74M Methyl N-({(2s,3s)-3-[(propylamino)carbonyl]oxiran-2-yl}carbonyl)-L-isoleucyl-L-prolinate 0.824 3 77B Benzyl N-({(2s,3s)-3-[(benzylamino)carbonyl]oxiran-2-yl}carbonyl)-L-isoleucyl-L-prolinate 0.800