5-(Methoxymethylene)-2,2-dimethyl-1,3-dioxane-4,6-dione15568-85-1100 % similar 1,3-Dimethyl 2-(methoxymethylene)propanedioate22398-14-757 % similar Meldrum'S acid2033-24-135 % similar 2,2,6-Trimethyl-4H-1,3-dioxin-4-one5394-63-834 % similar Diethyl (ethoxymethylene)malonate87-13-834 % similar 2,2,5-Trimethyl-1,3-dioxane-4,6-dione3709-18-033 % similar 6,6-Dimethyl-5,7-dioxaspiro[2.5]octane-4,8-dione5617-70-933 % similar