氟磺酸甲酯

4-hydroxy-3,5,6-trimethylpyran-2-one

硫酸二甲酯

6-(3-hydroxybutan-2-yl)-2,2,5-trimethyl-1,3-dioxin-4-one

2,2,5-trimethyl-6-(3-oxobutan-2-yl)-1,3-dioxin-4-one