Four new alkaloids named fenfangjines F, G, H, and I were isolated fro
m the root of Stephania tetrandra S. MOORE, the Chinese traditional me
dicine ''Fen-Fang-Ji''. The chemical structures of fenfangjines F, G,
H, and I were determined to be 1, 2, 3, and 4 by spectral analyses and
chemical methods, respectively.