X-Ray crystallographic determination of the structure of a grindelane diterpenoid from Lasiocorys capensis
Abstract
Lasiocoryin from Lasiocorys capensis(Labiatae) is the first 9,13-epoxylabdane (grindelane) diterpenoid to have its structure elucidated by crystallographic analysis; it forms a novel cyclic dimeric acetal on treatment with acid, and this study makes a minor correction to, but otherwise confirms, the stereochemistry of lagochilin.