Flavonoid Glycosides from Terminalia catappa L.

Journal of the Chinese Chemical Society
2000.0

Abstract

<jats:title>Abstract</jats:title><jats:p>Under the inhibition of Cu<jats:sup>+2</jats:sup>‐induced LDL oxidation‐guided fractionation, two new flavone glycosides with galloyl substitution were isolated from the dried fallen leaves of Terminalia catappa L. Their structures were established as apigenin 6‐<jats:italic>C</jats:italic>‐(2″‐<jats:italic>O</jats:italic>‐galloyl)‐β‐<jats:italic>D</jats:italic>‐glucopyranoside (<jats:bold>1</jats:bold>) and apigenin 8‐<jats:italic>C</jats:italic>‐(2″‐<jats:italic>O</jats:italic>‐galloyl)‐β‐<jats:italic>D</jats:italic>‐glucopyranoside (<jats:bold>2</jats:bold>), together with four known flavone glycosides, isovitexin, vitexin, isoorientin, and rutin, on the basis of spectroscopic method. Compounds <jats:bold>1</jats:bold> and <jats:bold>2</jats:bold> showed significant antioxidative effects. Their IC<jats:sub>50</jats:sub> were 2.1 and 4.5 μM, respectively.

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