From the epigeal part of Aconitum karakolicum growing in the upper reaches of the R. Tyup (KirghizSSR) have been isolated phenyl-β-naphthylamine, aconitine, aconifine, songorine, napelline, and the new base acetylnapelline. On the basis of a study of spectral characteristics and chemical transformations it has been shown that the alkaloid is the C-11-monoacetate of napelline. © 1979 Plenum Publishing Corporation.