diethyl 2,5-diaminocyclohexa-1,4-diene-1,4-dicarboxylate

双环[2.2.2]辛烷-1,4-二羧酸二乙酯

2,5-二氨基四邻苯二甲酸二乙酯

7,9-dioxobicyclo[3.2.2]nonane-1,5-dicarboxylic acid

diethyl 2,5-dianilinocyclohexa-1,4-diene-1,4-dicarboxylate