A new naphtoquinone and 9 known phenolic components were isolated from a Japanese
drug the roots of Polygonum cuspidatum. The new component was proved to be 2-methoxy-6-acetyl-7-methyljuglone.
Polygonum cuspidatum
- Polygonaceae - Antraquinones - Naphthoquinone - 2-Methoxy-6-acetyl-7-methljuglone