title: Photochemistry of 17beta-hydroxyestra-5(10),9(11)-dien-3-one. Synthesis of AB spiro steroids1,2.
mesh_terms: D004963:Estrenes / Q000528:radiation effects*; D007536:Isomerism; D010777:Photochemistry; D013141:Spiro Compounds / Q000138:chemical synthesis*
chemical_list: D004963:Estrenes; D013141:Spiro Compounds