2-O-(β-<scp>l</scp>-Arabinopyranosyl)-myo-inositol as a Main Constituent of Tea (Camellia sinensis)

Sakata, Kanzo; Yamauchi, Harumi; Yagi, Akihito; Ina, Kazuo; Pa̋rkányi, László; Clardy, Jon

doi:10.1080/00021369.1989.10869755

Cited by 3 publications

(1 citation statement)

References 5 publications

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“…As well as the “usual” markers (catechins, caffeine, or theanine), compounds such as theogallin (5-galloyl quinic acid) or 2- O -(β- l -arabinopyranosyl)-myo-inositol are also detected. The latter compounds have not often been analyzed but have been described as potentially playing a role in quality ( , ). Theogallin has been quantified a few times by chromatography ( − ) but was only once considered as a quality marker by the authors ().…”

Section: Introductionmentioning

confidence: 99%

Metabolite Profiling Using ¹H NMR Spectroscopy for Quality Assessment of Green Tea, Camellia sinensis (L.)

Gall

Colquhoun

Defernez

2004

J. Agric. Food Chem.

209

154

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A set of 191 green teas from different countries was collected and analyzed by (1)H NMR. It was proposed to establish if the teas could be discriminated according to the country of origin or with respect to quality. Both principal component analysis (PCA) and cluster analysis were applied to the data. Some separation of Chinese and non-Chinese teas was observed. The present results did not allow allocation of samples to individual countries, but cluster analysis suggested that it might be possible with an augmented sample set. The PCA did show a separation between the Longjing type (highest quality Chinese tea) and most other Chinese teas and indicated some metabolites that could be responsible for the difference. Longjing teas showed higher levels of theanine, gallic acid, caffeine, epigallocatechin gallate, and epicatechin gallate and lower levels of epigallocatechin when compared with other teas. These compounds have been mentioned previously in connection with quality, but it was also shown that higher levels of theogallin (5-galloyl quinic acid), theobromine, 2-O-(beta-l-arabinopyranosyl)-myo-inositol and some minor sugar-containing compounds were found in Longjing teas while higher levels of fatty acids and sucrose were found in the other teas. These new markers could prove to be useful for the authentication of bulk tea.

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Section: Introductionmentioning

confidence: 99%

Metabolite Profiling Using ¹H NMR Spectroscopy for Quality Assessment of Green Tea, Camellia sinensis (L.)

Gall

Colquhoun

Defernez

2004

J. Agric. Food Chem.

209

154

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Tea Chemistry

Harbowy

Balentine

Davies

et al. 1997

Critical Reviews in Plant Sciences

452

158

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Mm3 Modeling of Aldopentose Pyranose Rings

Dowd

Rockey

French

et al. 2002

Journal of Carbohydrate Chemistry

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MM3 (version 1992, ϵ=3.0) was used to study the ring conformations of d-xylopyranose, d-lyxopyranose and d-arabinopyranose. The energy surfaces exhibit low-energy regions corresponding to chair and skew forms with high-energy barriers between these regions corresponding to envelope and half-chair forms. The lowest energy conformer is 4 C 1 for α-and β-xylopyranose and α-and β-lyxopyranose, and the lowest energy conformer is 1 C 4 for α-and β-arabinopyranose. Only α-lyxopyranose exhibits a secondary low-energy region ( 1 C 4 ) within 1 kcal/mol of its global minimum. Overall, the results are in good agreement with NMR and crystallographic results. For many of these molecules, skew conformations are found with relatively low energies (2.5 to 4 kcal/mol above lowest energy chair form). The 2 S O and 1 C 4 conformers of crystalline benzoyl derivatives of xylopyranose are in secondary low-energy regions on the β-xylopyranose surface, within 3.8 kcal/mol of the global 4 C 1 minimum. Disciplines Biochemical and Biomolecular Engineering | Biological Engineering | Chemical Engineering

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2-O-(β-l-Arabinopyranosyl)-myo-inositol as a Main Constituent of Tea (Camellia sinensis)

Cited by 3 publications

References 5 publications

Metabolite Profiling Using ¹H NMR Spectroscopy for Quality Assessment of Green Tea, Camellia sinensis (L.)

Metabolite Profiling Using ¹H NMR Spectroscopy for Quality Assessment of Green Tea, Camellia sinensis (L.)

Tea Chemistry

Mm3 Modeling of Aldopentose Pyranose Rings

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2-O-(β-l-Arabinopyranosyl)-myo-inositol as a Main Constituent of Tea (Camellia sinensis)

Cited by 3 publications

References 5 publications

Metabolite Profiling Using 1H NMR Spectroscopy for Quality Assessment of Green Tea, Camellia sinensis (L.)

Metabolite Profiling Using 1H NMR Spectroscopy for Quality Assessment of Green Tea, Camellia sinensis (L.)

Tea Chemistry

Mm3 Modeling of Aldopentose Pyranose Rings

Contact Info

Product

Resources

About

Metabolite Profiling Using ¹H NMR Spectroscopy for Quality Assessment of Green Tea, Camellia sinensis (L.)

Metabolite Profiling Using ¹H NMR Spectroscopy for Quality Assessment of Green Tea, Camellia sinensis (L.)