Dendrobinium salts

A-Methyldendrobinium chloride (84) was the first quaternary picrotoxane alkaloid isolated and characterized by Inubushi 114). The next dendrobinium salt isolated was A-isopentenyldendrobinium chloride (85) 81). Its structure was determined by pyrolysis to dendrobine (82). The configuration of its quaternary nitrogen was determined by synthesis 81). 

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