Quaternary Bases from Hunteria eburnea Pichon

A re-examination of the quaternary alkaloids of Hunteria eburnea has shown the presence of antirhine β-methochloride 6, dihydroantirhine β-methochloride 7 (originally called H. alkaloid J), and pleiocarpamine methochloride 5 (H. alkaloid F). A novel structure (1) has been forwarded for hunteracine chloride (bromide).