A further study of the alkaloid constituents of Aconitum forrestii led to the isolation of three new C19-diterpenoid alkaloids, named 14-acetoxy-8-O-methylsachaconitine (1), 14-acetoxyscaconine (2), and 8-O-ethylcammaconine (3). Their structures were determined by UV, IR, and MS, 1D- and 2D-NMR analyses. © 2013 Verlag Helvetica Chimica Acta AG, Zürich.