Botanicals and phytochemicals from the bark of Hypericum roeperianum (Hypericaceae) had strong antibacterial activity and showed synergistic effects with antibiotics against multidrug-resistant bacteria expressing active efflux pumps

Olive Monique F. Demgne, François Damen, Aimé G. Fankam, Michel-Gael F. Guefack, Brice E. N. Wamba, Paul Nayim, Armelle T. Mbaveng, Gabin Thierry M. Bitchagno, Léon Azefack Tapondjou, Véronique Penlap, Pierre Tane, Thomas Efferth, Victor Kuete