Invasion Inhibitors of Human Fibrosarcoma HT 1080 Cells from the Rhizomes of <i>Zingiber cassumunar</i>: Structures of Phenylbutanoids, Cassumunols
The methanolic extract and its EtOAc-soluble fraction from the rhizomes of Zingibercassumunar inhibited invasion of human fibrosarcoma HT 1080 cells. From the EtOAc-soluble fraction, eight new phenylbutanoids, cassumunols A-H, were isolated together with 30 known constituents. The structures of new phenylbutanoids were elucidated on the basis of chemical and physicochemical evidence. Principal constituents