Lipophilic tea polyphenols (LTP) were prepared by catalytic esterification of green tea polyphenols (GTP) with hexadecanoyl chloride. A novel long chain acyl derivative of epigallocatechin 3 o gallate (EGCG) ...Lipophilic tea polyphenols (LTP) were prepared by catalytic esterification of green tea polyphenols (GTP) with hexadecanoyl chloride. A novel long chain acyl derivative of epigallocatechin 3 o gallate (EGCG) was first isolated from 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 gallate 4′ O hexadecanate , was elucidated by means of elemental analysis, IR, 1H NMR and MS spectra.展开更多
In order to reveal difference of phenolic substances and the content in the different varieties of pomegranate fruit and different mature period. The article uses 3 different fruit color phenotype （white, red, green...In order to reveal difference of phenolic substances and the content in the different varieties of pomegranate fruit and different mature period. The article uses 3 different fruit color phenotype （white, red, green） pomegranate cultivars as materials, the peel were determined by high performance liquid chromatography respectively （composition and content of phenolic compounds in the seeds and juice）. Results shows that the varieties of pomegranate peel and seeds were detected in 13 kinds of phenols, juice was detected in 12 type, and which did not detect epicatechin. At the same time, there was a significant difference in different parts of different varieties of pomegranate phenolic content.展开更多
文摘Lipophilic tea polyphenols (LTP) were prepared by catalytic esterification of green tea polyphenols (GTP) with hexadecanoyl chloride. A novel long chain acyl derivative of epigallocatechin 3 o gallate (EGCG) was first isolated from 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 gallate 4′ O hexadecanate , was elucidated by means of elemental analysis, IR, 1H NMR and MS spectra.
文摘In order to reveal difference of phenolic substances and the content in the different varieties of pomegranate fruit and different mature period. The article uses 3 different fruit color phenotype （white, red, green） pomegranate cultivars as materials, the peel were determined by high performance liquid chromatography respectively （composition and content of phenolic compounds in the seeds and juice）. Results shows that the varieties of pomegranate peel and seeds were detected in 13 kinds of phenols, juice was detected in 12 type, and which did not detect epicatechin. At the same time, there was a significant difference in different parts of different varieties of pomegranate phenolic content.
