7-Ketoprostaglandin I(2) 7-Oxo-pgi2-Na 7-Oxoprostacyclin 7-oxoprostaglandin I2 79821-50-4 Prosta-5,13-dien-1-oic acid, 6,9-epoxy-11,15-dihydroxy-7-oxo-, (5Z,9alpha,11alpha,13E,15S)-