Three new alkaloids, delavaconitine C I (R1 = R3 = H; R2 = Bz), delavaconitine D I (R1 = Ac; R2 = Bz; R3 = H), and delavaconitine E I (R1 = H; R2 = Bz; R3 = OAc) and a known alkaloid, delavaconine, were isolated from the roots of A. delavayi. The chem. structures of I were established by UV, IR, MS, 1H and 13C NMR spectral data and chem. evidence. Delavaconine was isolated from the plant for the first time.

Key words: ALKALOID, ULTRAVIOLET SPECTROPHOTOMETRY, INFRARED SPECTROPHOTOMETRY, MASS SPECTROGRAPHY, C13 NMR SPECTROMETRY, PROTON MAGNETIC RESONANCE SPECTROMETRY, ACONITUM CARMACHAELI, DITERPENES, CHEMICAL STRUCTURE, ACONITUM DELAVAYI FRANCH