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Phenolic constituents from the lichen Parmotrema stuppeum (Nyl.) Hale and their antioxidant activity.

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Title Phenolic constituents from the lichen Parmotrema stuppeum (Nyl.) Hale and their antioxidant activity.
 
Creator Jayaprakasha, G. K.
Jaganmohan Rao, L.
 
Subject 10 Plants
32 Antioxidants
 
Description Lichen, Parmotrema stuppeum (P. stuppeum) was successively extracted with benzene and acetone. Both the extracts were fractionated on 1% oxalic acid impregnated silica gel column to obtain four phenolic compounds. The structures of compounds were identified by 1H and 13C NMR spectra as methyl orsenillate, orsenillic acid, atranorin and lecanoric acid respectively. Antioxidant activity of benzene extract, acetone extract and isolated compounds were evaluated in a beta-carotene-linoleate model system. The pure compounds showed moderate antioxidant activity. This is the first report on the isolation and characterisation of compounds from the lichen P. stuppeum as well as on their antioxidant activity.
 
Date 2000
 
Type Article
PeerReviewed
 
Format application/pdf
 
Language en
 
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Identifier http://ir.cftri.com/2141/1/Lichen-phenolics-antioxidant.pdf
Jayaprakasha, G. K. and Jaganmohan Rao, L. (2000) Phenolic constituents from the lichen Parmotrema stuppeum (Nyl.) Hale and their antioxidant activity. Zeitschrift für Naturforschung. C, Journal of biosciences, 55 (11-12). pp. 1018-22. ISSN 0341-0382 (Submitted)