Composition #3: Maas, Mareike., Hensel, Andreas., da Costa, Fernando Batista., Brun, Reto., Kaiser, Marcel., Schmidt, Thomas J. An unusual dimeric guaianolide with antiprotozoal activity and further sesquiterpene lactones from Eupatorium perfoliatum. PHYTOCHEMISTRY, 2011, vol. 72, no. 7, p. 635–644. DOI: 10.1016/j.phytochem.2011.01.025.
[
DOI link]