The structures of two new CI9diterpene alkaloids, 10-hydroxyneoline 111 and 14-0-acetyl- 10-hydmxyneoline [2], isolated from Aronitumfubtmnci native to Mt. Neng-Gao in Taiwan, were determined by spectroscopic analysis and chemical reactions. Chemical investigation of the roots of Aconitum fukutomei Hay. (Ranunculaceae), collected at Mt. Neng-Go, Dai-Zhong Province in Taiwan, resulted in the isolation of two new diterpene alkaloids 1 and 2 along with seven known compounds, neoline [3] (1) (11% based on the crude base), 14-acetylneoline (2) (0.7%), 15-a-hydroxyneoline (3,4) (0.3%), senbusine A (5) (0.2%), isotalatitidine (6) E57 (0.03%), mesaconitine (1) (0.07%), and lassiocarpine (7) (0.3%). Here we describe the structural elucidation of the alkaloids 1 and 2.