Doc:FL63AG
From Metabolomics.JP
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| − | Gallocatechins refer to a subgroup of [[:Category:FL63|Flavan 3-ol]] derivatives (FL63AG). Compared to catechins, they have an additional phenolic hydroxyl group. Catechin gallates are gallic acid esters of the catechins, and [[FL63AGNS0001|(-)-Epigallocatechin gallate]] (EGCG) is the most abundant catechin in green tea | + | Gallocatechins refer to a subgroup of [[:Category:FL63|Flavan 3-ol]] derivatives (FL63AG). Compared to catechins, they have an additional phenolic hydroxyl group. Catechin gallates are gallic acid esters of the catechins, and [[FL63AGNS0001|(-)-Epigallocatechin gallate]] (EGCG) is the most abundant catechin in green tea but not in black tea.<br/>([[Doc:Tea|more ...]]) |
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| − | ガロカテキン類は[[:Category:FL63|Flavan 3-ol]]の下にあるグループで、カテキン類のフェノール部に水酸基が1つ追加されたものです。カテキンガレートは、カテキンが没食子酸とエステル結合したもので、[[FL63AGNS0001|(-)-Epigallocatechin gallate]] (EGCG) | + | ガロカテキン類は[[:Category:FL63|Flavan 3-ol]]の下にあるグループで、カテキン類のフェノール部に水酸基が1つ追加されたものです。カテキンガレートは、カテキンが没食子酸とエステル結合したもので、[[FL63AGNS0001|(-)-Epigallocatechin gallate]] (EGCG)は緑茶中に最も多いカテキンですが、紅茶には含まれません。<small>([[Doc:Tea|詳細]])</small> |
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Latest revision as of 11:50, 24 December 2009
Gallocatechins refer to a subgroup of Flavan 3-ol derivatives (FL63AG). Compared to catechins, they have an additional phenolic hydroxyl group. Catechin gallates are gallic acid esters of the catechins, and (-)-Epigallocatechin gallate (EGCG) is the most abundant catechin in green tea but not in black tea.
(more ...)
| Structure | 
|
|
|
|---|---|---|---|
| Name | (+)-Gallocatechin or D-Gallocatechin; GC |
(-)-Epigallocatechin or L-Epigallocatechin; EGC |
(-)-Gallocatechin or L-Gallocatechin |
| B-ring stereo | ↓ | ↓ | ↑ |
| 3-Hydroxyl stereo | ↑ | ↓ | ↓ |
| Gallate form | 
|
|
|
| (+)-Gallocatechin gallate or GCG | (-)-Epigallocatechin gallate or EGCG | (-)-Gallocatechin gallate | |
| B-ring stereo | ↓ | ↓ | ↑ |
| 3-Hydroxyl stereo | ↑ | ↓ | ↓ |
| Catechins | (+)-Catechin | (-)-Epicatechin | ent-Catechin |
