diethyl (1R,2S,3r)-3-(trifluoromethyl)cyclopropane-1,2-dicarboxylate

diethyl 2-(2-bromo-3,3-difluoroallyl)malonate

diethyl 2-piperidin-2-ylidenepropanedioate

diethyl 2-[(3,4,5-trimethoxyphenyl)methylidene]propanedioate

2-(3-甲基丁亚基)丙二酸二乙酯