title: Crystal and molecular structure of a dioxadiazaspirophosphorane derived from (minus)-ephedrine.
mesh_terms: D001372:Aza Compounds; D003461:Crystallography; D004809:Ephedrine; D009943:Organophosphorus Compounds; D010753:Phosphoranes; D013141:Spiro Compounds
chemical_list: D001372:Aza Compounds; D009943:Organophosphorus Compounds; D010753:Phosphoranes; D013141:Spiro Compounds; D004809:Ephedrine