3-Acetoxy-3,4-dimethyl-1,2-pentandicarbonsaeure-diethylester

diethyl 4-(6-ethoxy-4-(ethoxycarbonyl)-2-methylene-6-oxohexyl)cyclohex-4-ene-1,2-dicarboxylate

反式-环戊烷-1,2-二羧酸二乙酯

5-Aminocarbonyl-1H-pyrazole-4-carboxylic acid ethyl ester