1,3-DIOXOLANE, 2-(2,6-DIMETHYL-1,5-HEPTADIENYL)- 2-(2,6-Dimethyl-1,5-heptadienyl)-1,3-dioxolane 66408-78-4 Citracetal Citral ethylene glycol acetal Citral ethyleneglycol acetal EINECS 266-344-0