Abstract
Terminalia brownii is an African medicinal plant used to treat parasitic and microbial infections [1]. Chromatographic separations on the stem bark extract aimed at identifying the active components led to isolation of a new oleanane-type triterpenoid, along with seven known oleanane-type triterpenoids and seven ellagic acid derivatives. The new compound was identified using spectroscopic methods as 3β,24-O-ethylidenyl-2α,19α-dihydroxyolean-12-en-28-oic acid (1). 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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