Displaying 1 results of Promestriene Stable Isotopes Promestriene stable isotopes are a group of isotopes that have the same atomic number but differ in mass. These isotopes are used in biomedical research to study the metabolism and pharmacokinetics of promestriene, a synthetic estrogen used in hormone replacement therapy. The stable isotopes allow for precise measurements of promestriene levels in biological samples, aiding in the development of safe and effective treatments for menopause symptoms.