The investigation of Aster umbellatus afforded six new eudesmanolides and a new selina-triene and from Aster exilis a new tremetone derivative was isolated. The structures were elucidated by spectroscopic methods and by some chemical transformations. The chemotaxonomic situation is discussed briefly. © 1980.
Bohlmann, F., Dutta, L. N., Knauf, W., Robinson, H., & King, R. M. (1980). Neue sesquiterpenlactone aus Aster umbellatus. Phytochemistry, 19(3), 433–436. https://doi.org/10.1016/0031-9422(80)83195-5