This study is planned to determine the antioxidant activity and total phenols content of
the essential oil and different solvent extracts of the endemic plant Merremia borneensis. The antioxidant
activities of the extracts were examined by three different methods, DPPH, b-carotene and
reducing power assays. In all methods, aqueous ethanol extract exhibited a higher activity potential
than that of other extracts (hexane, chloroform, ethyl acetate and butanol) and the essential oil. As
assumed, the amount of total phenolics was very high in this extract. Chloroform extract has been
found to be rich in flavonoids. A positive result was observed between the antioxidant activity
potential and total flavonoid levels of the extracts