A new sesquiterpenoid coumarin from Ferula assafoetida

摘要

The gum resin of Ferula assafoetida Linn. afforded one new sesquiterpene, asimafoetida 1 and three known sesquiterpenoid coumarins. The structure has been established from extensive 2D NMR spectral studies as 7′-[7-(1R,3S)-5- Hydroxy-6,6-dimethyl-2-methylene-cyclohexyl]-9-methyl-9-pentenyl]oxy] -2H-1-benzopyran-2-one. The other three known compounds are ferulic acid, farnesiferol A and farnesiferol C.