1-苯基吡唑烷-3,5-二酮

乙酰乙酸乙酯

3-(3,5-dioxo-1-phenylpyrazolidin-4-ylidene)butanamide

3-[3,5-Dioxo-1-phenyl-pyrazolidin-(4Z)-ylidene]-butyric acid methyl ester

3-[3,5-Dioxo-1-phenyl-pyrazolidin-(4Z)-ylidene]-butyric acid tert-butyl ester