As the result of a further study of the total alkaloids from the epigeal part of Aconitum turczaninowi we have isolated beiwutine and delcaroline and also a new alkaloid, which has been called turcosine. The structure of turcosine as 6β,16β-dimethoxy-4β-methoxymethyl-1α,7β,8β,10β,14α-pentahydroxy-N-ethylaconitane has been shown from a study of the IR, mass, PMR, and13C NMR spectra of the alkaloid and of the triacetate obtained from it. © 1993 Plenum Publishing Corporation.