Furanosesquiterpenes from Eremophila rotundifolia

Abstract

Two new furanosesquiterpenes, 7-methyl-7-(4'-methylpenta-1',3'-dienyl)- 4,5,6,7-tetrahydrobenzofuran and 4-hydroxydendrolasin [(S,E)-9-(furan- 3'-yl)-2,6-dimethylnona-2,6-dien-4-ol], are described. The structure of the former compound was confirmed by synthesis from dihydrophymaspermone and the structure and stereochemistry of 4- hydroxydendrolasin were established by synthesis from eremoacetal.