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Oligomeric proanthocyanidins from mangosteen pericarps.
J Agric Food Chem. 2007 Sep 19; 55(19):7689-94.JA

Abstract

Oligomeric proanthocyanidins were extracted from mangosteen pericarps and fractionated by a Sephadex LH-20 column to give 0.66% yield (dry matter). (13)C and (1)H NMR signals showed the presence of predominantly procyanidins together with a few prodelphinidin units along with small amounts of stereoisomers of afzelechin/epiafzelechin, catechin/epicatechin, and gallocatechin/epigallocatechin. Depolymerization with benzylmercaptan resulted in epicatechin thioether as the major product, and the mean degree of polymerization was determined to be 6.6. The electron spray ionization-mass spectrometry and matrix-assisted laser desorption/ionization time-of-flight mass spectra revealed the dominant B type oligomers with mainly epicatechin units and with a small amount of A type oligomers. The isolated proanthocyanidins are potent peroxyl radical scavengers as evidenced by the high oxygen radical scavenging capacity at 1.7 x 10 (4) micromol TE/g, much higher than that of pine bark and grape seed extracts.

Authors+Show Affiliations

Department of Chemistry, National University of Singapore, 3 Science Drive 3, Singapore 117543, Republic of Singapore.No affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

17715900

Citation

Fu, Caili, et al. "Oligomeric Proanthocyanidins From Mangosteen Pericarps." Journal of Agricultural and Food Chemistry, vol. 55, no. 19, 2007, pp. 7689-94.
Fu C, Loo AE, Chia FP, et al. Oligomeric proanthocyanidins from mangosteen pericarps. J Agric Food Chem. 2007;55(19):7689-94.
Fu, C., Loo, A. E., Chia, F. P., & Huang, D. (2007). Oligomeric proanthocyanidins from mangosteen pericarps. Journal of Agricultural and Food Chemistry, 55(19), 7689-94.
Fu C, et al. Oligomeric Proanthocyanidins From Mangosteen Pericarps. J Agric Food Chem. 2007 Sep 19;55(19):7689-94. PubMed PMID: 17715900.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Oligomeric proanthocyanidins from mangosteen pericarps. AU - Fu,Caili, AU - Loo,Alvin Eng Kiat, AU - Chia,Fiona Ping Ping, AU - Huang,Dejian, Y1 - 2007/08/23/ PY - 2007/8/25/pubmed PY - 2007/12/13/medline PY - 2007/8/25/entrez SP - 7689 EP - 94 JF - Journal of agricultural and food chemistry JO - J Agric Food Chem VL - 55 IS - 19 N2 - Oligomeric proanthocyanidins were extracted from mangosteen pericarps and fractionated by a Sephadex LH-20 column to give 0.66% yield (dry matter). (13)C and (1)H NMR signals showed the presence of predominantly procyanidins together with a few prodelphinidin units along with small amounts of stereoisomers of afzelechin/epiafzelechin, catechin/epicatechin, and gallocatechin/epigallocatechin. Depolymerization with benzylmercaptan resulted in epicatechin thioether as the major product, and the mean degree of polymerization was determined to be 6.6. The electron spray ionization-mass spectrometry and matrix-assisted laser desorption/ionization time-of-flight mass spectra revealed the dominant B type oligomers with mainly epicatechin units and with a small amount of A type oligomers. The isolated proanthocyanidins are potent peroxyl radical scavengers as evidenced by the high oxygen radical scavenging capacity at 1.7 x 10 (4) micromol TE/g, much higher than that of pine bark and grape seed extracts. SN - 0021-8561 UR - https://www.unboundmedicine.com/medline/citation/17715900/Oligomeric_proanthocyanidins_from_mangosteen_pericarps_ L2 - https://doi.org/10.1021/jf071166n DB - PRIME DP - Unbound Medicine ER -