Uncarine C (Fig.1) and its isomers D and E were isolated from Uncaria fiorida VIDAL (collected in Formosa, Japanese namd "Togesoheba"), Uncarine A and B (Fig.1) from U.Kawakamii HAYATA (collected in Formosa), and rhynchophylline and isorhynchophylline from U.rhynchophylla MIQ. (collected in Japan) were isolated. Isolations of these substances are interesting from chemotaxonomical view.
