15-Hydroxy-9alpha,11alpha-peroxidoprosta-5,13-dienoic acid 2,3-Dioxabicyclo[2.2.1]heptane, prosta-5,13-dien-1-oic acid deriv. 42935-17-1 Endoperoxide H2 Prosta-5,13-dien-1-oic acid, 9,11-epidioxy-15-hydroxy-, (5Z,9alpha,11alpha,13E,15S)- (9CI) Prostaglandin H2 Prostaglandin R2