SEARCH Articles Figures Tables Tryptamine-derived Zincke aldehydes ZINCKE-SUHL Cyclohexadienone Synthesis Zincke aldehydes Zincke anhydride Zincke exchange reactions Zincke reaction Zincke reaction Mechanism Zincke reaction, pyridinium Zincke reaction, pyridinium salts Zincke salts Zincke, Theodor Zincke-Suhl reaction Zincke’s salt