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Procyandin B2

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https://www.readbyqxmd.com/read/25793378/identification-of-proanthocyanidins-from-litchi-litchi-chinensis-sonn-pulp-by-lc-esi-q-tof-ms-and-their-antioxidant-activity
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Qiang Lv, Fenglei Luo, Xiaoyong Zhao, Yu Liu, Guibing Hu, Chongde Sun, Xian Li, Kunsong Chen
Content of total proanthocyanidins as well as total phenolics, flavonoids, antioxidant activities were evaluated for litchi (Litchi chinensis Sonn.) pulp of 32 cultivars. One cultivar, Hemaoli, showed the highest total proanthocyanidins and total phenolics, and DPPH or ABTS radical scavenging activities. ESI-MS and NMR analysis of the Hemaoli pulp crude extracts (HPCE) showed that procyandins composed of (epi)catechin unites with degree of polymerization (DP) of 2-6 were dominant proanthocyanidins in HPCE. After the HPCE was fractionated by a Sephadex LH-20 column, 32 procyanidins were identified by LC-ESI-Q-TOF-MS in litchi pulp for the first time...
2015: PloS One
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