Schisandrosides A–D, Dibenzocyclooctadiene Lignan Glucosides from the Roots of Schisandra chinensis

Four new dibenzocyclooctadiene lignan glucosides, schisandrosides A–D (1–4), as well as two known rare nortriterpenoids, micrandilactone C (5) and propindilactone Q (6), were isolated from the roots of Schisandra chinensis BAILLON (Schisandraceae). The structure of compounds 1–4 were elucidated by physical and spectroscopic data interpretation. To the best of our knowledge, schisandrosides A–D (1–4) represent the first example of a dibenzocyclooctadiene lignan glycoside.