7-羟基吡唑并[1,5-a]嘧啶-5-羧酸乙酯

diethyl furo[3,2-c]quinoline-2,3-dicarboxylate

bis[2-(diethylamino)ethyl] but-2-ynedioate

diethyl 2,3-dithiocyanatobut-2-enedioate

diethyl 4-methyl-1,3-diphenylindazole-6,7-dicarboxylate