5-iodo-2,2,6-trimethyl-1,3-dioxin-4-one

三氟甲烷磺酸甲酯

5-acetyl-2,2,5-trimethyl-1,3-dioxane-4,6-dione

2-甲基-3-氧代丁酸叔丁酯

丙酮