Polyprenylated benzophenones, which exist in Garcinia species (Guttiferae) had many biological activities. To study the bioactive constituents of the fruit and the stem of Garcinia cowa, two polyprenylated benzophenones (a novel compound named Guttiferone K and an known compound Cambogin) were obtained, whose structures were elucidated by spectral analysis.

Key words: Garcinia cowa, benzophenone, Guttiferone K