Abstract
Chemical constituents, in particular, aristololactam derivatives of nine Aristolochia species (A. shimadai, A. manshuriensis, A. cucurbitifolia, A. westlandii, A onoei, A. kaempferi, A. liukiuensis, A. debilis and A. tagara) were analyzed by means of high performance liquid chromatography. The results chemotaxonomically suggested their subgenera, and sometimeas their sections are restricted by the relative content of aristololactam derivatives.