1,3-Cyclohexanedione, 2,2'-methylenebis[5,5-dimethyl- 2,2-Methylenebis[5,5-dimethyl-1,3-cyclohexanedione] 2181-22-8 5,5-Dimethyl-1,3-cyclohexanedione formaldehyde deriv Formaldehyde, dimedon deriv. NSC404203