4-ethenyl-2,6-dimethyl-1,3-dioxane;2,4-dimethyl-6-vinyl-1,3-dioxane;1,3-Dioxane, 4-ethenyl-2,6-dimethyl-, (2.alpha.,4.beta.,6.alpha.)-;2.alpha.,4.alpha.-Dimethyl-6.beta.-vinyl-1,3-dioxane
4-ethenyl-2,6-dimethyl-1,3-dioxane