1,4-环己二酮单乙二醇缩酮

8-Formyl-8-(4-methoxyphenyl)-1,4-dioxaspiro<4.5>dec-6-ene

8-(hydroxymethyl)-8-(4-methoxyphenyl)-1,4-dioxaspiro[4.5]dec-6-ene

methyl 1-(4-methoxyphenyl)-4-oxo-2-cyclohexenecarboxylate

methyl 4'-methoxy-4-oxo-[1,1'-bi(cyclohexane)]-2,2',4'-triene-1-carboxylate