A Series of Sesquiterpenes with a 7α-Isopropyl Side Chain and Related Compounds Isolated from Curcuma wenyujin

摘要: Sesquiterpenoids possessing a 7α-isopropyl group, such as curcumol (1a), curdione (2a), curcumalactone (3), and new epoxy germacrane, (1R, 10R)-epoxy-(-)-1, 10- dihydrocurdione (5a), were isolated from the essential oil of Curcuma wenyujin. Other related sesquiterpenes, neocurdione (4) (1S, 10S), (4S, 5S)-germacrone-1(10), 4-diepoxide (6) also this plant. The stereostructures absolute configurations these sesquiterpenes established on basis spectroscopic chemical data well X-ray crylstallographic analyses.