11,9-Epoxymethano-pgh1 11,9-Epoxymethanoprostaglandin H1 2-Oxabicyclo(2.2.1)heptane-5-heptanoic acid, 6-(3-hydroxy-1-octenyl)-, (1alpha,4alpha,5beta,6alpha(1E,3S*))-(+-)- 72517-81-8