1-苯基-1H-1,2,3-噻唑

6,6-二甲基-5-亚甲基-1,3-环戊二烯

6,6-Dimethylfulven-2,3-dicarbonsaeure-dimethylester

二甲基1-苯基-1H-1,2,3-三唑-4,5-二羧酸酯

dimethyl 5,5-dimethylpyrazole-3,4-dicarboxylate