1. Introduction
Boesenbergia rotunda (Linn.) Mansf. or Boesenbergia pandulata
(Roxb.) Schltr. (Zingiberaceae) is widely used as a spice in some
Asian countries such as Indonesia, Malaysia, and Thailand. It is also
used as traditional medicine for stomach pain and discomfort, viral
and bacterial infection, inflammation, and as diuretic agent.
A number of chalcones and flavonoids derivatives isolated from