Abstract
Sesquiterpene coumarins were isolated from
Ferula vesceritensis and
Ferula sinaica. One of them was a sesquiterpene with a rare carbon skeleton.
Fractionation of methylene chloride extracts of the resin of
Ferula vesceritensis and
F. sinaica afforded three sesquiterpene coumarins and a glucose derivative. One of them was a sesquiterpene with a rare carbon skeleton. The structures of these compounds were determined by extensive NMR studies, including DEPT, COSY, NOE, HMQC, and HMBC.