1,3-Dioxolane, 2-(p-isopropyl-alpha-methylphenethyl)- 2-(p-Isopropyl-alpha-methylphenethyl)-1,3-dioxolane Cyclamen aldehyde ethylene glycol acetal JH8100000 alpha-Methyl-para-isopropylhydrocinnamic aldehyde ethylene glycol acetal