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
Sage is popular for its manifold applications and has always been used in herbalism. The Salvia genus encompasses up to 900 species, but only a few of them have been investigated. Hence, the objective was to investiga...Sage is popular for its manifold applications and has always been used in herbalism. The Salvia genus encompasses up to 900 species, but only a few of them have been investigated. Hence, the objective was to investigate the essential oil content as well as the terpene composition of a number of Saliva species. In this context, S. officinalis var. Extrakta, S. officinalis ＂Aurea＂ and S. patens were investigated for the first time. To some extent, it was also possible to associate the terpene distribution of the investigated commercial sage teas and drops with the processed sage oil. Furthermore, an ultrasonic extraction with ethyl acetate seems to be an efficient quick-method for extracting the essential oil.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Sage is popular for its manifold applications and has always been used in herbalism. The Salvia genus encompasses up to 900 species, but only a few of them have been investigated. Hence, the objective was to investigate the essential oil content as well as the terpene composition of a number of Saliva species. In this context, S. officinalis var. Extrakta, S. officinalis ＂Aurea＂ and S. patens were investigated for the first time. To some extent, it was also possible to associate the terpene distribution of the investigated commercial sage teas and drops with the processed sage oil. Furthermore, an ultrasonic extraction with ethyl acetate seems to be an efficient quick-method for extracting the essential oil.
