Reaction catalyzed by 3-carboxyethylcatechol 2,3-dioxygenase (1.13.11.16)

		+			=
	3-(2,3-dihydroxyphenyl)propanoate	+		O2	=		(2Z,4E)-2-hydroxy-6-oxonona-2,4-diene-1,9-dioate