From the total alkaloids of the epigeal part of the plant Aconitum orientale have been isolated the known alkaloid kobusine and a new alkaloid, which has been called orgetine. A structure has been put forward for orgetine on the basis of spectral characteristics (IR, PMR,13C NMR, and mass spectra) and the production of a triacetate. © 1992 Plenum Publishing Corporation.