Reaction catalyzed by (13E)-labda-7,13-dien-15-yl diphosphate synthase (4.2.3.B67), labda-7,13-dienyl diphosphate synthase (5.5.1.30)

		=
	geranylgeranyl diphosphate	=		(13E)-labda-7,13-dien-15-yl diphosphate