Two new norditerpenoid alkaloids, 1-demethylwinkleridine and 18-demethyl-14-deacetylpubescenine, and a new bisnorditerpenoid alkaloid, hohenackeridine, were isolated from the aerial parts of Aconitella hohenackeri, and their structures elucidated by 1D and 2D NMR spectroscopy techniques. (C) 1997 Elsevier Science Ltd. All rights reserved.