Abstract
Terminalia brownii is an African medicinal plant used to treat parasitic and microbial infections. A new oleanane-type triterenoid was isolated from its stem bark extract by bioassay-guided fractionation using the method of chromatographic separations and was identified as 3,24-O-ethylidenyl-2,19-dihydroxyolean-12-en-28-oic acid (1), along with seven known oleanane-type triterpenoids and seven ellagic acid derivatives. The compounds were evaluated for their antiplasmodial, antileishmanial and antimicrobial activities giving the most potent antiplasmodial activity with IC50 values of 2.76 µg/mL for 23-galloylarjunolic acid (2) against P. falciparum W2 strain and the most potent antimicrobial activity with IC50 values of 0.32 µg/mL for diellagic lactone (3) against C. glabrata.
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