From the aerial parts of Delphinium crispulum five known norditerpenoid alkaloids, deltatsine, browniine, karakoline, ezochasmanine and isotalatizidine, and the C-20 alkaloid hetisine as well as two new compounds, crispulidine and delphicrispuline, were isolated. Structures of the newly isolated allkaloids were established by spectroscopic methods. (C) 1998 Elsevier Science Ltd. All rights reserved.