70803-92-8 9-Hdtpd 9-Hydroxy-11,15-dioxo-2,3,18,19-tetranorprost-5-ene-1,20-dioic acid Cyclopentanehexanoic acid, 2-(4-carboxy-2-butenyl)-3-hydroxy-gamma,5-dioxo-, (1R-(1alpha,2beta(Z),3beta))- PGD-M Prostaglandin D-M