Reaction catalyzed by 7-geranyloxy-5-hydroxy-2-methoxy-3-methylnaphthalene-1,4-dione synthase (2.5.1.125)

		+			=			+
	geranyl diphosphate	+		flaviolin	=		diphosphate	+		3-(3,7-dimethylocta-1,6-dien-3-yl)-2,5,7-trihydroxynaphthalene-1,4-dione