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Main Article Content
Free radical scavenging activity of phenylpropanoid and iridoid esters glycosides from <em>Stereospermum kunthianum</em>
Abstract
Relative antioxidant activities of the crude methanolic extract of Stereospermum kunthianum, two phenylpropanoid glycosides and one iridoid glycosides called Stereospermiside 1，Stereospermin 2，Stereostin 3 previously isolated and characterized from the plant were studied. The free radical scavenging activity was determined by the 2, 2-diphenylpicrahydrazil radical (DPPH) using a spectrophotometer and the absorbance measured at 517nm. The result of the study revealed a significant antioxidant activity of the phenylpropanoid ester glycosides 1, 2 and 3. This work lends support to the antioxidant property of the S. kunthianum.
