二溴甲烷

三氯钛(1+)甲烷i去

1,4-二氧杂螺[4.5]-2-癸酮

3-(triphenyl-λ⁵-phosphanylidene)-1,4-dioxaspiro[4.5]decan-2-one

2-bromo-1,4-dioxaspiro[4.5]decan-3-one