Reaction catalyzed by dCTP diphosphatase (3.6.1.12), 8-oxo-dGTP diphosphatase (3.6.1.55), (d)CTP diphosphatase (3.6.1.65)

		+		H2O	=			+
	5-methyl-dCTP	+		H2O	=		5-methyl-dCMP	+		diphosphate