A New Norditerpenoid Alkaloid from Aconitum geniculatum

Geniculine 1, a new norditerpenoid alkaloid, was isolated from the root of Aconitum geniculatum Fletcher et Lauener (Ranunculaceae). Its structure was elucidated as 20-ethyl-8-acetoxy-14 -( p -hydroxybenzoyloxy)-1α,6α,16β,18-tetramethoxyaconitane-3α,13β-diol mainly by 1D and 2D NMR techniques.