(Ethylenedioxy)cyclohexane 1,4-Dioxaspiro(4.5)decane 177-10-6 2,2-PENTAMETHYLENE-1,3-DIOXOLANE 5-19-01-00222 (Beilstein Handbook Reference) AI3-22536 BRN 0104573 Cyclohexanone ethylene acetal Cyclohexanone ethylene ketal EINECS 205-867-0 NSC 87562 Spiro(cyclohexane-1,2'-(1,3)dioxolane)