A library of diarylurea IGFR inhibitors was screened for activity against chloroquine-sensitive (3D7) and chloroquine-resistant (K1) strains of Plasmodium falciparum. The 4-aminoquinaldine-derived diarylureas displayed promising antimalarial potency. Further exploration of the B ring of 4-aminoquinaldinyl ureas allowed identification of several quinaldin-4-yl ureas 4{13, 39} and 4{13, 58} sufficiently potent against both 3D7 and K1 strains to qualify as bone fide leads.
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Zhang et al. (2010) studied this question.
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