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Main Article Content
Free radical scavenging activity of phenylpropanoid and iridoid esters glycosides from Stereospermum kunthianum
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.
