Abstract
Three new dihydrostilbenes, stilbostemins J–L (1–3), and a new dihydrophenanthrene, stemanthrene F (4), were isolated from the roots of Stemona japonica together with two known bibenzyls, 3,5-dihydroxy-4-methylbibenzyl (5) and 3,5-dihydroxy-2′-methoxy-4-methylbibenzyl (6). Their structures were elucidated by spectroscopic analyses. Compounds 3–6 exhibited strong antibacterial activities against Staphylococcus aureus and Staphylococcus epidermidis.
Acknowledgements
This work was supported by a grant from National Natural Science Foundation of China (No. 30123005).