MALDI-TOF MS analysis of condensed tannins with potent antioxidant activity from the leaf, stem bark and root bark of Acacia confusa.

Molecules : a Journal of Synthetic Chemistry and Natural Product Chemistry
Shu-Dong WeiWei-Ming Chai

Abstract

The structures of the condensed tannins from leaf, stem bark and root bark of Acacia confusa were characterized by matrix-assisted laser desorption/ionization time-of-flight mass spectrometry (MALDI-TOF MS) analysis, and their antioxidant activities were measured using 1,1-diphenyl-2-picrylhydrazyl (DPPH) free radical scavenging and ferric reducing/antioxidant power (FRAP) assays. The results showed that the condensed tannins from stem bark and root bark include propelargonidin and procyanidin, and the leaf condensed tannins include propelargonidin, procyanidin and prodelphinidin, all with the procyanidin dominating. The condensed tannins had different polymer chain lengths, varying from trimers to undecamers for leaf and root bark and to dodecamers for stem bark. The condensed tannins extracted from the leaf, stem bark and root bark all showed a very good DPPH radical scavenging activity and ferric reducing power.

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Citations

Dec 15, 2010·International Journal of Molecular Sciences·Shu-Dong WeiYi-Ming Lin
May 5, 2011·International Journal of Molecular Sciences·Shu-Dong WeiYi-Ming Lin
Feb 9, 2016·Journal of Agricultural and Food Chemistry·Antoine Duval, Luc Avérous
Feb 23, 2013·Molecules : a Journal of Synthetic Chemistry and Natural Product Chemistry·Ali KhoddamiThomas H Roberts
Mar 13, 2014·Journal of Mass Spectrometry : JMS·Thais GuaratiniDenise Brentan Silva
Feb 9, 2020·Molecules : a Journal of Synthetic Chemistry and Natural Product Chemistry·Ana Clara da Costa PinaffiElizabeth A F S Torres
May 28, 2020·Molecules : a Journal of Synthetic Chemistry and Natural Product Chemistry·Abdirahman ElmiDominique Laurain-Mattar

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