title: Chemical nature and pharmacological actions of quaternary ammonium salts.
mesh_terms: D064751:Ammonium Compounds; D000644:Quaternary Ammonium Compounds; D012492:Salts
chemical_list: D064751:Ammonium Compounds; D000644:Quaternary Ammonium Compounds; D012492:Salts
keywords: AMMONIUM COMPOUNDS