INTRODUCTION In the course of our investigation of anti-oxidative and anti-inflammatory natural products [l-3], we have stud- ied the constituents in the rhizomes of Curcuma domestica Val. (Zingiberaceae), which have been used, not only as yellow colouring agent, but also for traditional medicine in Asia. It is well known that the rhizomes of C. domestica have potent anti-oxidative and anti-inflammatory activit- ies, and the activities have been explained by the effect of a ...