Journal
JOURNAL OF CHROMATOGRAPHY A
Volume 1085, Issue 2, Pages 270-277Publisher
ELSEVIER
DOI: 10.1016/j.chroma.2005.06.042
Keywords
ellagitannins; gallotannins; HPLC-ESI-MS; longan seed; phenolics; proanthocyanidins
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High-performance liquid chromatography coupled with electrospray ionization mass spectrometry (HPLC-ESI-MS) analysis revealed the phenolics profile of longan (Dimocarpus longan Lour.) seed. Gallic acid, ellagic acid, monogalloyl-glucose, monogalloyl-diglucose, digalloyl-diglucose, penta- to heptagalloyl-glucose, ellagic acid-pentose conjugate, galloyl-HHDP (Hexahydroxydiphenoyl)-glucopyranose, pentagalloy-HHDP-glucopyranose, procyanidin A-type dimer, procyanidin 132 and quercetin-3-O-rhamnoside were found to be present in longan seed along with a number of, as yet, unknown compounds. The results illustrate the rich array of phenolic compounds in longan seeds which could be utilized as health-beneficial bioactive compounds rather than just discarded as waste. (c) 2005 Published by Elsevier B.V.
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