3-碘-氮杂丁烷-1-羧酸叔丁酯

ethyl N-(ethoxycarbonylamino)-N-phenacylcarbamate

ethyl N-[2-cyclohexyl-1-[ethoxycarbonyl-(ethoxycarbonylamino)amino]-2-oxoethyl]-N-(ethoxycarbonylamino)carbamate

diethyl 5,6-bis(acetyloxymethyl)-7-oxa-2,3-diazabicyclo[2.2.1]hept-5-ene-2,3-dicarboxylate

diethyl 4,5-dimethyl-3,6-dihydropyridazine-1,2-dicarboxylate