Reaction catalyzed by 3-hydroxy-2-methylpyridine-4,5-dicarboxylate 4-decarboxylase (4.1.1.51)

		=			+
	3-hydroxy-2-methylpyridine-4,5-dicarboxylate	=		3-hydroxy-2-methylpyridine-5-carboxylate	+		CO2