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Theaflavin-3-Gallate

$535

  • Brand : BIOFRON

  • Catalogue Number : BD-P0313

  • Specification : 98.0%(HPLC)

  • CAS number : 30462-34-1

  • PUBCHEM ID : 212974

  • Volume : 25mg

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Catalogue Number

BD-P0313

Analysis Method

HPLC,NMR,MS

Specification

98.0%(HPLC)

Storage

-20℃

Molecular Weight

Appearance

Yellow powder

Botanical Source

Tea/Black Tea

Structure Type

Flavonoids

Category

Standards;Natural Pytochemical;API

SMILES

C1C(C(OC2=CC(=CC(=C21)O)O)C3=CC(=C(C4=C(C(=O)C=C(C=C34)C5C(CC6=C(C=C(C=C6O5)O)O)OC(=O)C7=CC(=C(C(=C7)O)O)O)O)O)O)O

Synonyms

Theaflavin monogallate A/Benzoic acid, 3,4,5-trihydroxy-, 1,8-bis[(2R,3R)-3,4-dihydro-3,5,7-trihydroxy-2H-1-benzopyran-2-yl]-4,6-dihydroxy-5-oxo-5H-benzocyclohepten-3-yl ester/benzoic acid, 3,4,5-trihydroxy-, (2R,3R)-2-[1-[(2R,3R)-3,4-dihydro-3,5,7-trihydroxy-2H-1-benzopyran-2-yl]-3,4,6-trihydroxy-5-oxo-5H-benzocyclohepten-8-yl]-3,4-dihydro-5,7-dihydroxy-2H-1-benzopyran-3-yl ester/theaflavin-3-gallate/Benzoic acid, 3,4,5-trihydroxy-, (2R,3R)-2-[1-[(2R,3R)-3,4-dihydro-3,5,7-trihydroxy-2H-1-benzopyran-2-yl]-3,4,5-trihydroxy-6-oxo-6H-benzocyclohepten-8-yl]-3,4-dihydro-5,7-dihydroxy-2H-1-benzopyran-3-yl ester/4,6-Dihydroxy-5-oxo-1,8-bis[(2R,3R)-3,5,7-trihydroxy-3,4-dihydro-2H-chromen-2-yl]-5H-benzo[7]annulen-3-yl 3,4,5-trihydroxybenzoate/theaflavin-3'-O-gallate/(2R,3R)-5,7-Dihydroxy-2-{3,4,5-trihydroxy-6-oxo-1-[(2R,3R)-3,5,7-trihydroxy-3,4-dihydro-2H-chromen-2-yl]-6H-benzo[7]annulen-8-yl}-3,4-dihydro-2H-chromen-3-yl 3,4,5-trihydroxybenzoate/(2R,3R)-5,7-Dihydroxy-2-{3,4,6-trihydroxy-5-oxo-1-[(2R,3R)-3,5,7-trihydroxy-3,4-dihydro-2H-chromen-2-yl]-5H-benzo[7]annulen-8-yl}-3,4-dihydro-2H-chromen-3-yl 3,4,5-trihydroxybenzoate

IUPAC Name

Applications

Theaflavin-3-gallate, a black tea theaflavin monomer, is regarded as the biologically important active component of black tea and provides health benefits. Theaflavin-3-gallate acts as prooxidants and induces oxidative stress in the carcinoma cells. Theaflavin-3-gallate reacts directly with reduced glutathione (GSH) in a time- and concentration-dependent manner[1].

Density

1.8±0.1 g/cm3

Solubility

Methanol

Flash Point

382.0±27.8 °C

Boiling Point

1202.8±65.0 °C at 760 mmHg

Melting Point

InChl

InChI=1S/C36H28O16/c37-14-5-20(39)18-10-26(45)35(51-27(18)7-14)17-9-25(44)33(48)30-16(17)1-12(2-24(43)32(30)47)34-29(11-19-21(40)6-15(38)8-28(19)50-34)52-36(49)13-3-22(41)31(46)23(42)4-13/h1-9,26,29,34-35,37-42,44-46,48H,10-11H2,(H,43,47)/t26-,29-,34-,35-/m1/s1

InChl Key

KMJPKUVSXFVQGZ-WQLSNUALSA-N

WGK Germany

RID/ADR

HS Code Reference

2933990000

Personal Projective Equipment

Correct Usage

For Reference Standard and R&D, Not for Human Use Directly.

Meta Tag

provides coniferyl ferulate(CAS#:30462-34-1) MSDS, density, melting point, boiling point, structure, formula, molecular weight etc. Articles of coniferyl ferulate are included as well.>> amp version: coniferyl ferulate

No Technical Documents Available For This Product.

PMID

30482011

Abstract

Theaflavins, the orange-red pigments contained in black tea, have attracted attention as a result of their health-promoting effects. However, their synthetic preparation, in which the enzymatic oxidation of catechol-type catechin is followed by the quinone-induced oxidative dimerization of selectively combined catechol- and pyrogallol-type catechins, provides only a low yield. In the present study, we found that a 1-octanol/buffer biphasic system improved the yield of theaflavin 3-gallate in a tyrosinase-catalyzed synthetic reaction with (-)-epicatechin and (-)-epigallocatechin gallate. When the enzymatic reaction proceeded in a buffer solution, oxidized (-)-epigallocatechin gallate was preferentially used for self-dimerization. However, self-dimerization was suppressed in the octanol phase, allowing oxidized (-)-epigallocatechin gallate to participate in coupling with (-)-epicatechin quinone, leading to effective production of theaflavin 3-gallate. Furthermore, the preferential localization of theaflavin 3-gallate in the octanol phase prevented (-)-epicatechin-quinone-induced degradation.

KEYWORDS

1-octanol; biphasic system; enzymatic synthesis; theaflavin; tyrosinase

Title

Efficient Synthesis of Theaflavin 3-Gallate by a Tyrosinase-Catalyzed Reaction With (-)-Epicatechin and (-)-Epigallocatechin Gallate in a 1-Octanol/Buffer Biphasic System

Author

Asako Narai-Kanayama 1 , Yoshinori Uekusa 2 , Fumiyuki Kiuchi 2 , Tsutomu Nakayama 1 3

Publish date

2018 Dec 26

PMID

29488451

Abstract

Black tea is a highly popular beverage, and its pigments, polymerized catechins such as theaflavins (TFs), are attracting attention due to their beneficial health effects. In this study, to test the inhibitory activities of TFs on the intestinal absorption of cholesterol, we investigated their effects on phosphatidylcholine (PC) vesicles in the absence or presence of a bile salt. (-)-Epicatechin gallate, (-)-epigallocatechin gallate, and TFs formed insoluble complexes with PC vesicles. Galloylated TFs such as TF2A, TF2B, and TF3 precipitated far more than other polyphenols. The subsequent addition of taurocholate redispersed the polyphenol-PC complexes, except that a large amount of TF2A remained insoluble. After incubation with taurocholate-PC micelles, TF2A elevated the turbidity of the micelle solution, providing red sediments. The TF2A-specific effect was dependent on the PC concentration. These results suggest that TF2A interacts with PC and aggregates in a specific manner different from catechins and other TFs.

KEYWORDS

1-octanol; biphasic system; enzymatic synthesis; theaflavin; tyrosinase

Title

2018 Mar

Author

Asako Narai-Kanayama 1 , Kosuke Saruwatari 1 , Natsumi Mori 1 , Tsutomu Nakayama 1

PMID

18346048

Abstract

This study compared the in vitro responses of human gingival fibroblasts and of carcinoma cells derived from the tongue to theaflavin-3-gallate (TF-2A) and theaflavin-3′-gallate (TF-2B), polyphenols in black tea. The antiproliferative and cytotoxic effects of the theaflavin monomers were more pronounced to the carcinoma, than to the normal, cells. In phosphate buffer at pH 7.4, the theaflavins generated hydrogen peroxide and the superoxide anion, suggesting that their mode of toxicity may be due, in part, to the induction of oxidative stress. In a cell-free assay, TF-2A and TF-2B reacted directly with reduced glutathione (GSH), in a time- and concentration-dependent manner. Intracellular storages of GSH were depleted on treatment of the cells with the theaflavin monomers. Depletion of intracellular GSH was more extensive with TF-2A than with TF-2B and was more pronounced in the carcinoma, than in the normal, cells. The toxicities of the theaflavins were potentiated when the cells were cotreated with the GSH depleter, d,l-buthionine-[S,R]-sulfoximine. In the presence of catalase, pyruvate and divalent cobalt, all scavengers of reactive oxygen species, the cytotoxicities of the theaflavins were lessened. TF-2A and TF-2B induced lipid peroxidation in the carcinoma cells, whereas in the fibroblasts, peroxidation was evident upon exposure to TF-2A, but not to TF-2B. These studies demonstrated that the black tea theaflavin monomers, TF-2A and TF-2B, act as prooxidants and induce oxidative stress, with carcinoma cells more sensitive than normal fibroblasts.

Title

Theaflavin-3-gallate and theaflavin-3'-gallate, Polyphenols in Black Tea With Prooxidant Properties

Author

Harvey Babich 1 , Reena T Gottesman, Emily J Liebling, Alyssa G Schuck

Publish date

2008 Jul