5-甲氧基-3H-苯并恶唑-2-酮

4-methyl-5-phenyl-1,3-dioxol-2-one

5,5-二甲基-1,3-恶唑烷-3-甲酰氯

3-羟基苯甲酰氯

4,4,5,5-tetramethylimidazolidin-2-one