Cr. Weiss et al., Activity of extracts and isolated naphthoquinones from Kigelia pinnata against Plasmodium falciparum, J NAT PROD, 63(9), 2000, pp. 1306-1309
Four naphthoquinoids from Kigelia pinnata rootbark were assessed in vitro a
gainst chloroquine-sensitive (T9-96) and -resistant (K1) Plasmodium falcipa
rum strains and for cytotoxicity using KB cells. 2-(1-Hydroxyethyl)naphtho[
2,3-b]furan-4,9-dione possessed good activity against both strains [IC50 va
lues 627 nM (K1), 718 nM (T9-96)]. Isopinnatal, kigelinol, and isokigelinol
exhibited lower activity against both strains.