Reaction catalyzed by 2-hydroxymuconate tautomerase (5.3.2.6)

		+			=
	acetaldehyde	+		2-(cyclopentyloxy)-1-methoxy-4-[(E)-2-nitroethenyl]benzene	=		4-[3-(cyclopentyloxy)-4-methoxyphenyl]-5-nitropentan-2-one