Chemistry of the compositae. Part 38. Structure and absolute configuration of gallicin, a new germacranolide from Artemisia
Abstract
Gallicin, a new germacranolide, was isolated from Artemisia maritima gallica Willd and assigned structure (3a) on chemical and spectroscopic evidence. Its absolute configuration was determined by the fact that it can be converted to the dihydrosantamarin (5) by a biogenetic cyclization process.