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Food Chemistry, May 2014

New polyglucopyranosyl and polyarabinopyranosyl of fatty acid derivatives from the fruits of Lycium chinense and its antioxidant activity.

Intitulé de l'article

New polyglucopyranosyl and polyarabinopyranosyl of fatty acid derivatives from the fruits of Lycium chinense and its antioxidant activity

Revue

Food Chemistry, Volume 151

Date de publication

15 May 2014

Auteurs

Ill-Min Chung,

Mohd Ali,

Nagella Praveen,

Bo-Ra Yu,

Seung-Hyun Kim,

Ateeque Ahmad

Abstract

Four new compounds 3,4-dihydroxy benzoic acid 3-octadecanoyl-4-O-α-l-arabinopyranosyl (2a→1b)-2a-O-α-l-arabinopyranosyl-(2b→1c)-2b-O-α-l-arabinopyranoside , 2,6,10-trimethyl-n-dodec-2-en-1-oyl-1-O-α-l-arabinopyranosyl-(2a→1b)-2a-O-α-l-arabinopyranosyl-(2b→1c)-2b-O-α-l-arabinopyranosyl-(2c→1d)-2c-O-α-l-arabinopyranosyl-(2d→1e)-2d-O-α-l-arabinopyranosyl-(2e→1f)-2e-O-α-l-arabinopyranosyl-(2f→1g)-2f-O-α-l-arabinopyranoside , n-docos-9,12-dienoyl-α-d-glucopyranosyl-(2a→1b)-2a-O-α-d-glucopyranosyl-(2b→1c)-2b-O-α-d-glucopyranosyl-(2c→1d)-2c-O-α-d-glucopyranosyl-(2d→1e)-2d-O-α-d-glucopyranosyl-(2e→1f)-2e-O-α-d-glucopyranoside , β-d-glucopyranosyl-(2a→1b)-2a-O-β-l-arabinopyranosyl-(2b→1c)-2b-O-β-l-arabinopyranosyl-(2c→1d)-2c-O-β-l-arabinopyranosyl-(2d→1e)-2d-O-β-l-arabinopyranosyl-(2e→1f)-2e-O-β-l-arabinopyranoside  along with some know compounds, were isolated and identified from a methanol extract Lycium chinense fruits. Their structures were determined of the new compounds using one- and two-dimensional NMR spectroscopies in combination by IR, FAB/MS and HR-FAB/MS. The compounds 1–4 were investigated for the antioxidant potential using 1,1-diphenyl-2-picrylhydrazyl (DPPH) radical scavenging activity, reducing power and the phosphomolybdenum activity and the results demonstrate that the compounds has potential as a natural antioxidant whereas the compound  exhibited moderate activity and the compound exhibited weak antioxidant activity.

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