THUJOPSENE-RELATED AND CIS-MUUROLANE-RELATED SESQUITERPENOIDS FROM CUPRESSUS-BAKERI

Several thujopsene-related sesquiterpenoids from the foliage of Cupres sus bakeri were isolated and identified: the known thujopsadiene, thuj opsan-2 alpha-ol and mayurone; and two compounds, mayurone epoxide and thujopsenol epoxide, which have been reported only as products of oxi dation reactions of thujopsene. Two new cis-muurolane-related terpenoi ds were also isolated and identified as (+)-2-ethylmenthone and (+)-in dipone [(1R, methylpropyl)-4,9-dimethybicyclo[4.0.3]non-4-ene]. The la tter, with a novel carbon skeleton, is probably derived from the co-oc curring (-)-epizonarene.