Reaction catalyzed by thromboxane-A synthase (5.3.99.5)

		=
	(5Z,13E)-(15S)-9alpha,11alpha-epidioxy-15-hydroxyprosta-5,13-dienoate	=		(5Z,13E)-(15S)-9alpha,11alpha-epoxy-15-hydroxythromboxa-5,13-dienoate