Abstract
An alkaloid of Daphniphyllum macropodum Miquel was first isolated in 1909 as a white amorphous powder, m.p. 75-84°, C_<27>H_<41>O_4N, and named dephnimacrine. We have examined the alkaloidal components of the same plant and isolated nine new alkaloids. The structures of the two typical alkaloids, daphniphylline (I) and yuzurimine (X), were determined by X-ray diffraction studies and the structures of other alkaloids, codaphniphylline (VIII), yuzurimine A (XI), yuzurimine B (XII) and secodaphniphylline (XIV), were deduced by the chemical reactions and the careful comparison of physical data among them. These natural products are regarded as a new type of alkaloid.
