an N(3)-methyl-2'-deoxycytidine in double-stranded DNA + 2-oxoglutarate + O2 => a 2'-deoxycytidine in double-stranded DNA + formaldehyde + succinate + CO2 + H(+)
an n(3)-methyl-2'-deoxycytidine in double-stranded dna + 2-oxoglutarate + o2 => a 2'-deoxycytidine in double-stranded dna + formaldehyde + succinate + co2 + h(+)