From root tubers of Ayurvedic-processed and unprocessed Aconitum ferox, one known diterpenoid alkaloid vakognavine, and nine known norditerpenoid alkaloids, chasmaconitine, crassicauline-A, falconericine, bikhaconine, pseudaconine, neoline, senbusine-A, isotalatizidine and columbianine, were isolated. In addition, a new compound, 14-O-acetylsenbusine A (8), was found in the unprocessed drug. Complete 1H NMR spectra of these alkaloids are given for the first time. Shift assignments were made with the help of 1H NMR spectra, spin-decoupling studies, 1H-1H COSY and 13C-1H COR experiments. Several earlier 13CNMR assignments of pseudaconine, neoline, senbusine A, isotalatizidine and aconine have been revised. © 1994.