PEROXIDES AS CONSTITUENTS OF PLANTS .19. A C-50-HYDROPEROXIDE FROM HYPERICUM-PERFORATUM

A new C-50-hydroperoxide (1) with a hitherto unknown constitution, con taining cadinane hydroperoxide and hyperforin (2) as partial structure s, was isolated from the stems and leaves of St. John's wort (Hypericu m perforatum L., Hypericaceae). The structure was elucidated by high-r esolution NMR techniques (1D and 2D NMR experiments).