12-Epinapelline and its N-oxide fromAconitum baicalense

12-Epinapelline and its N-oxide have been isoated from the epigeal part ofAconitum baicalense Turcz. ex Rapaics (A. Czekanovskyi Steinb.). The structures of these compounds have been determined with the aid of two-dimensional¹H and¹³C NMR spectroscopy, and IR and mass spectrometry.Irkutsk Institute of Organic Chemistry, Siberian Branch, Russian Academy of Sciences. Translated from Khimiya Prirodnykh Soedinenii, No. 6, pp. 888–892. November–December, 1993.