5-O-ethyl 3-O-methyl 4-phenyl-4,5-dihydro-1H-pyrazole-3,5-dicarboxylate

β-羟基苯丙酸乙酯

5-苯基-1,3-环己二酮

ethyl 2,4-dioxo-6-phenylcyclohexane-1-carboxylate

3-苯基戊二酸