1. Korseveriline, korseveridine, and the new alkaloid korseveridinine have been isolated from the ether-soluble alkaloids of the epigeal part of Korolkovia severtzovii Rgl., collected in Katrantau. 2. On the basis of the results of a study of the IR, NMR, and mass spectra of korseveridinine and its conversion into the known alkaloid korseveridinone, the structure and configuration of korseveridinine have been established as cevan-8(14)-ene-3α,15β-diol. © 1977 Plenum Publishing Corporation.