二氯乙醛

dichloro-acetic acid-(2-chloro-ethyl ester)

methyl 1,4-dioxaspiro[4.5]dec-7-ene-7-carboxylate

methyl 1,4-dioxaspiro[4.5]dec-7-ene-8-carboxylate

2,3-dibutoxy-1,4-dioxane