1,1,4,4-Tetrabenzyloxycarbonyltetrazen

3,4-bis(2,2-dimethyl-1,3-dioxolan-4-yl)-2-oxido-1,2,5-oxadiazol-2-ium

dimethyl 4,4-dimethylcyclobut-2-ene-1,2-dicarboxylate

2-邻甲苯基琥珀酸