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INTRODUCTIONGreenteapolyphenols (GTP)fromtheleavesofgreentea (CamelliasinensisL .)isusedasakindoffoodantioxidantanddietarysupplementasepigallocatechin 3 O gallate(EGCG) ,epicatechin (EC) ,epigallocatechin(EGC)andepicatechin 3 O gallate (ECG ;forstructur… 相似文献
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Lipophilic tea polyphenols (LTP) were prepared by catalytic esterifica tion of green tea polyphenols (GTP) with hexadecanoyl chloride. A novel long-ch a in acyl-derivative of epigallocatechin-3-o-gallate (EGCG) was first isol ated fro m purification of LTP by high-speed countercurrent chromatography (HSCCC) using a solvent system composed of n-hexane-ethyl acetate-methanol-water (1:1:1:1, v/v ). The molecular structure of the acyl-derivative, Epigallocatechin-3-O- gall ate-4′-O-hexadecanate , was elucidated by means of elemental analysis, I R, 1H-NMR and MS spectra. 相似文献
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