Alkaloids of the chinese herb guan-bai-fu ( [formula omitted]); guan-fu bases Y and A

Abstract

A new alkaloid, guan-fu base Y,has been isolated from Aconitum koreanum (Levl.)Raipaics and shown to be 2-acetoxy-14-hydroxyhetisine ( 2 ) from its nmr ( 1H, 13C) and mass spectra. A completed assignment of mmr peaka was made with the help of NOE and 2-D experiments which also suggest a revised structure ( 3 ) for guan-fu baae A ( 4 ).