Displaying 2 results of Melengestrol Stable Isotopes Melengestrol acetate is a synthetic progestin used as a veterinary drug to suppress estrus in cattle. Stable isotopes of melengestrol, such as carbon-13 and deuterium, are useful tools for studying metabolic pathways and drug metabolism in animals and humans. These isotopes have unique chemical properties that allow for precise tracking and quantification of drug metabolites in biological samples.