Reaction catalyzed by 2-hydroxymuconate tautomerase (5.3.2.6)

		+			=
	(1Z)-1-(nitromethylidene)-3a,4,5,6,7,7a-hexahydro-1H-indene	+		acetaldehyde	=		[1-(nitromethyl)-1H-inden-1-yl]acetaldehyde