@article{article0c73f16b,
title   = {An unusual dimeric guaianolide with antiprotozoal activity and further sesquiterpene lactones from Eupatorium perfoliatum},
author = {Maas, Mareike and Hensel, Andreas and Costa, Fernando Batista da and Brun, Reto and Kaiser, Marcel and Schmidt, Thomas J.},
year = {2011},
doi = {10.1016/j.phytochem.2011.01.025},
journal   = {Phytochemistry}
}