3-(4-methylphenyl)furan-2,5-dione

3,4-di(4-methylphenyl)furan-2,5-dione

3-phenylpyrrole-2,5-dione

5-(4-羟基苯基)海因

2,5-二氢-2,5-二氧代-1H-吡咯-1-乙酸甲酯