8,8-dimethoxyoct-4-en-1-ol,4-methylbenzenesulfonic acid

9-oxabicyclo[4.2.1]nonane

9-oxabicyclo[3.3.1]nonan-5-ol

7,8-Dioxabicyclo(4.2.2)decane

9,10-dioxabicyclo[3.3.2]decane