Stilbeno-phenylpropanoids from Gnetum montanum Markgr.

摘要

Graphical abstractDisplay OmittedHighlights?Four new stilbeno-phenylpropanoids were isolated fromGnetum montanum.?Analysis of shielded effect was used for elucidation of relative configurations.?Isorhapontigenin is the stilbene unit of all Gnetaceae stilbeno-phenylpropanoids.Four new stilbeno-phenylpropanoids, gnetumonins A?C (1?3) and (?)-gnetucleistol F (4), together with two known compounds, gnetupendin A and (+)-gnetofuran A, were isolated from the caulis ofGnetum montanumMarkgr. (Gnetaceae). The structures of those new compounds were established by extensive analysis of MS, 1D and 2D NMR spectroscopic data. The relative configurations of1?3were elucidated by means of the analysis of shielded effect correlating their key1H NMR shift changes.