Abstract
Nine sesquiterpenes and eight flavonoids were isolated from Zingiber spectabile for the first time. Structures were determined by spectroscopic methods. The major compound zerumbone (1) was found to be the most active (IC50 13 μg mL−1) in cell growth inhibitory assay against colon carcinoma SW480 cells.
Acknowledgements
This work was partly supported by a Grant-in-Aid from Tokyo Biochemical Research Foundation (TBRF), Japan.