Plasmodium falciparum effects of phaeanthine, a naturally occurring bisbenzylisoquinoline alkaloid, on chloroquine-resistant and chloroquine-sensitive parasites in vitro, and its influence on chloroquine activity - Ekong,R.; Partridge,S.J.; Anderson,M.M.; Kirby,G.C.; Warhurst,D.C.; Russell,P.F.; Phillipson,J.D. (Annals Tropical Medicine Parasitology, 1991)