1,4,5,8-Naphthodioxane 1,4,5,8-Tetraoxaperhydronaphthalene 4362-05-4 Ethanedial, cyclic 1,2:1,2-bis(1,2-ethanediyl acetal) NSC16182 Naphthodioxane [1,4]Dioxino[2,3-b]-1,4-dioxin, hexahydro- p-Dioxino[2,3-b]-p-dioxin, hexahydro-