SEARCH Articles Figures Tables A- ammonium Ammonium chiral Ammonium salt catalyst Ammonium salts, chiral Ammonium salts, reactions Catalysts Strecker reaction Chiral Strecker reaction Chiral catalysts Chiral catalysts reactions Chiral quaternary ammonium catalysts Quaternary ammonium catalysts Quaternary ammonium reaction Quaternary ammonium salts Quaternary ammonium salts catalysts Quaternary salts Reaction ammonium Reactions chiral Salts chiral Strecker Strecker reactions Streckerization reaction