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Biosci Biotechnol Biochem. 2011;75(11):2175-7. Epub 2011 Nov 7.

Antioxidative activity and chemical constituents of edible terrestrial alga Nostoc commune Vauch.

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Department of Materials Science and Technology, Faculty of Engineering, Gifu University, Gifu, Japan.


The extract of terrestrial alga Nostoc commune Vauch. has high antioxidative activity. Our study on N. commune Vauch. resulted in the isolation of two β-ionone derivatives, nostocionone and 3-oxo-β-ionone, together with four indole alkaloids, scytonemin, reduced scytonemin, N-(p-coumaroyl)tryptamine, and N-acetyltryptamine. The structures of the isolated compounds were determined on the basis of 1D and 2D NMR and MS analyses. Among these isolates, nostocionone and reduced scytonemin demonstrated strong antioxidative activities which were assessed by using a β-carotene oxidation assay.

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