title: A direct low temperature 1H and 19F nuclear magnetic resonance study of boron trifluoride complexes with 4-cholesten-3-one, 1(5beta)-androstene-3,17-dione, 5beta-androstane-3,17-dione, and obacunone.
mesh_terms: D000731:Androstanes; D001667:Binding, Competitive; D002782:Cholestenes; D005459:Fluorides; D008024:Ligands; D009682:Magnetic Resonance Spectroscopy; D013237:Stereoisomerism; D013256:Steroids; D013696:Temperature
chemical_list: D000731:Androstanes; D002782:Cholestenes; D008024:Ligands; D013256:Steroids; D005459:Fluorides