AROMADENDRANE SESQUITERPENES FROM PHEBALIUM, DRUMMONDITA, AND ERIOSTEMON SPECIES

Two known aromadendrane sesquiterpenes, (+)-spathulenol and (+)-4 beta , 10 alpha-dihydroxyaromadendrane, have been isolated from the aerial parts of Phebalium tuberculosum ssp. megaphyllum and P. filifolium. (- )-Ledol, another sesquiterpene of the same class, was found only in P. tuberculosum ssp. megaphyllum. Examination of the aerial parts of Eri ostemon brucei ssp. brucei showed it to contain(+)-13-hydroxyspathulen ol [1], which is novel, while (+)-spathulenol has also been isolated f rom Drummondita hassellii and D. calida.