Lignanamides and sesquiterpenoids from stems of Mitrephora thorelii

The first phytochemical investigation on stems of Mitrephora thorelii led to the isolation of three new lignanamides, thoreliamides A-C (1-3), and a new sesquiterpenoid, thorelinin (4), together with ten known compounds. The structures of the new compounds were established on the basis of extensive spectroscopic analyses. Thoreliamide C is the first trimer derived from cinnamic acid amide units.