Reaction catalyzed by catechol 2,3-dioxygenase (1.13.11.2), 3-carboxyethylcatechol 2,3-dioxygenase (1.13.11.16), biphenyl-2,3-diol 1,2-dioxygenase (1.13.11.39)

		+			=
	3-methylcatechol	+		O2	=		2-hydroxy-6-oxohepta-2,4-dienoate