(5Z,9-alpha,12E,15S)-9,15-Dihydroxy-11-oxoprosta-5,12-dien-1-oic acid 64072-89-5 BRN 6071542 Prosta-5,12-dien-1-oic acid, 9,15-dihydroxy-11-oxo-, (5Z,9-alpha,12E,15S)- delta(sup 12)-PGD2 delta(sup 12)-Prostaglandin D2