title: Elucidation of the solution conformation of the A ring in vitamin D using proton coupling constants and a shift reagent.
mesh_terms: D003500:Cyclization; D004872:Ergocalciferols; D007202:Indicators and Reagents; D009682:Magnetic Resonance Spectroscopy; D008968:Molecular Conformation; D012996:Solutions
chemical_list: D004872:Ergocalciferols; D007202:Indicators and Reagents; D012996:Solutions