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Chemical constituents from the leaves of Camellia sinensis

WU Li-jun

Open publisher page 3 citations

Abstract

Objective To isolate the chemical constituents and elucidate their structures from the leaves of Camellia sinensis.Methods The compounds were isolated by chromatography on silica gel,Sephadex LH-20 column and recrystallizing methods.NMR and MS were employed for the structure identification.Results Eight compounds were obtained and elucidated as:caffeine(1),theobromine(2),kaempferol(3),(+)-catechin(4),daucosterol(5),(Z)-9-hexadecenoic acid(6),phenyl-β-naphthylamine(7),gallic acid(8),respectively.Conclusions Among these compounds,5,6 and 7 are obtained from the Camellia genus for the first time.

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What this paper is about

Objective To isolate the chemical constituents and elucidate their structures from the leaves of Camellia sinensis.Methods The compounds were isolated by chromatography on silica gel,Sephadex LH-20 column and recrystallizing methods.NMR and MS were employed for the structure identification.Results Eight compounds were obtained and elucidated as:caffeine(1),theobromine(2),kaempferol(3),(+)-catechin(4),daucosterol(5),(Z)-9-hexadecenoic acid(6),phenyl-β-naphthylamine(7),gallic acid(8),respectively.Conclusions Among these compounds,5,6 and 7 are obtained from the Camellia genus for the first time.

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Available abstract

Objective To isolate the chemical constituents and elucidate their structures from the leaves of Camellia sinensis.Methods The compounds were isolated by chromatography on silica gel,Sephadex LH-20 column and recrystallizing methods.NMR and MS were employed for the structure identification.Results Eight compounds were obtained and elucidated as:caffeine(1),theobromine(2),kaempferol(3),(+)-catechin(4),daucosterol(5),(Z)-9-hexadecenoic acid(6),phenyl-β-naphthylamine(7),gallic acid(8),respectively.Conclusions Among these compounds,5,6 and 7 are obtained from the Camellia genus for the first time.

Key concepts: Theobromine, Camellia sinensis, Chemistry, Daucosterol, Sephadex, Gallic acid, Catechin, Kaempferol

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