Inhibitory activity on binding of specific ligands to the human angiotensin II AT(1) and endothelin 1 ET(A) receptors: bioactive benzo[c]phenanthridine alkaloids from the root of Bocconia frutescens. - Caballero-George,C.; Vanderheyden,P.M.; Apers,S.; Van den Heuvel,H.; Solis,P.N.; Gupta,M.P.; Claeys,M.; Pieters,L.; Vauquelin,G.; Vlietinck,A.J. (Planta Med, 2002)