Reaction catalyzed by hydroperoxide dehydratase (4.2.1.92)

		=			+		H2O
	(9Z,11E,15Z)-(13S)-hydroperoxyoctadeca-9,11,15-trienoate	=		(9Z,15Z)-(13S)-12,13-epoxyoctadeca-9,11,15-trienoate	+		H2O