11-keto Fluprostenol is an analog of prostaglandin D2 (PGD2) with structural modifications intended to give it a prolonged half-life and greater potency. Fluprostenol is a well-studied, potent analog of PGF2a and acts primarily through the FP receptor.{1182} Oxidation at C-11 of fluprostenol yields 11-keto fluprostenol. 11-keto Fluprostenol exhibits moderate binding to the CRTH2/DP2 receptor compared to PGD2 and essentially no activity at the DP1 receptor.{10723}