Journal
JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY
Volume 49, Issue 10, Pages 4642-4645Publisher
AMER CHEMICAL SOC
DOI: 10.1021/jf010573a
Keywords
Cedrus deodara; free radical; antioxidant activity; (-)-matairesinol; (-)-nortrachelogenin; dibenzylbutyrolactol
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An activity-directed fractionation and purification process was used to identify the antioxidant components of Cedrus deodara. Dried heartwood powder of C. deodara was first defatted with petroleum ether and then extracted with chloroform. The chloroform extract showed strong antioxidant activity on 1,1-diphenyl-2-picrylhydrazyl (DPPH) free radical. This fraction was then subjected to separation and purification using silica gel column chromatography. Three compounds with potent antioxidant activity were isolated in significant yields and identified by spectroscopic methods (H-1 NMR, C-13 NMR, IR, and MS). They were identified as (-)-matairesinol, (-)-nortrachelogenin, and a dibenzylbutyrolactollignan (4,4',9-trihydroxy-3,3'-dimethoxy-9,9'-epoxylignan). This is the first report of the occurrence of these compounds in C. deodara.
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