title: The molecular and crystal structure of psi-retroprogesterone.
mesh_terms: D055598:Chemical Phenomena; D002621:Chemistry; D008968:Molecular Conformation; D009653:Norprogesterones; D011374:Progesterone; D013329:Structure-Activity Relationship; D014961:X-Ray Diffraction
chemical_list: D009653:Norprogesterones; C011092:psi-retroprogesterone; D011374:Progesterone