15(R)-15-Methyl Prostaglandin F2α

15(R)-15-Methyl Prostaglandin F2α (15(R)-Carboprost; 15(R)-15-methyl PGF2α) is a metabolically stable analog of PGF2α. 15(R)-15-Methyl Prostaglandin F2α is an inactive, prodr_ug PGF agonist designed for activation by gastric acid after oral administration. Acid-catalyzed epimerization of 15(R)-15-Methyl Prostaglandin F2α converts it into the active 15(S)-isomer. The 15(S)-isomer induces luteolysis when injected in rhesus monkeys at a dose of about 12 mg/animal, while the 15(R)-isomer does not.