ethyl 3-oxo-1,2-dihydropyrazole-4-carboxylate

3-ethoxy-1H-pyrazole-4-carboxylic acid ethyl ester

氨乙烯基丙二酸二乙酯

diethyl 2-[[dimethyl(phenyl)silyl]methylidene]propanedioate

4-氯-5-氰基喹啉