Electrochemical evaluation of lipophilic antioxidants from Iryanthera juruensis fruits (Myristicaceae)
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Abstract
the presence of two compounds, with antioxidant properties towards β-carotene. They were isolated and
identified as 3-methyl-sargachromenol (1) and sargachromenol (2). Further investigation of the hexane
extract led to isolations of 3-methyl-sargaquinoic acid (3) and sargaquinoic acid (4). The electrochemical
behaviour of these compounds was studied in CH 2 Cl 2 /Bu 4 NBF 4 at glassy carbon electrode. The phenolic
group in both tocotrienols 1 and 2 are oxidized at +0.23V and +0.32V and their oxidation potentials are
correlated with the observed antioxidant activities and oxidation mechanism of α-tocopherol. The reductive
voltametric behaviour of quinone function in both plastoquinones 3 and 4 is discussed.
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