title: A synthetic approach to the 9(10:19)abeo-pregnane system, involving carbocyclic ring cleavage during Wolff-Kishner reduction.
mesh_terms: D000470:Alkaloids; D055598:Chemical Phenomena; D002621:Chemistry; D011083:Polycyclic Compounds
chemical_list: D000470:Alkaloids; D011083:Polycyclic Compounds