(8R,9S,10R,13S,14S,17R)-2,2,4,6,6-Pentadeuterio-17-hydroxy-10,13-dimethyl-1,7,8,9,11,12,14,15,16,17-decahydrocyclopenta[a]phenanthren-3-one

This compound is a deuterated analytical reference standard, used primarily in research and laboratory settings for quantitative analysis and method development. It is a stable isotope-labeled derivative of a steroid hormone, where five hydrogen atoms are replaced by deuterium, enabling precise tracking in mass spectrometry studies.