Studies on the alkaloids from Aconitum karakolicum rap.

A new C 2 0-diterpene alkaloid, karakomine (1) along with two known compounds, sangorine (2) and neoline (3), have been isolated from the roots of Aconitum karakolicum Rap. The structure of Karakomine was determined by 1D and 2D nmr spectroscopic analyses.