Doc:FL63AG

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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 (but not in black tea).
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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 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)は緑茶中に最も多いカテキンです(紅茶には含まれません)。
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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)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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| [[Image:FL63AGNS0002.png|150px]]
 
| [[Image:FL63AGNS0002.png|150px]]
 
| [[Image:FL63AGNS0003.png|150px]]
 
| [[Image:FL63AGNS0003.png|150px]]
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| [[Image:FL63AGNS0017.png|150px]]
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|-
 +
! Name
 +
| [[FL63AGNS0002|(+)-Gallocatechin or<br/>D-Gallocatechin; GC]]
 +
| [[FL63AGNS0003|(-)-Epigallocatechin or<br/> L-Epigallocatechin; EGC]]
 +
| [[FL63AGNS0002|(-)-Gallocatechin or<br/>L-Gallocatechin]]
 +
|-
 +
! B-ring stereo
 +
| &darr; || &darr; || &uarr;
 +
|-
 +
! 3-Hydroxyl stereo
 +
| &uarr; || &darr; || &darr;
 +
|-
 +
! Gallate form
 
| [[Image:FL63AGNS0004.png|150px]]
 
| [[Image:FL63AGNS0004.png|150px]]
 
| [[Image:FL63AGNS0001.png|150px]]
 
| [[Image:FL63AGNS0001.png|150px]]
 +
| [[Image:FL63AGNS0018.png|150px]]
 
|-
 
|-
! Name
+
!
| [[FL63AGNS0002|(+)-Gallocatechin or<br/>D-Gallocatechin]]
+
| [[FL63AGNS0003|(-)-Epigallocatechin or<br/> L-Epigallocatechin]]
+
 
| [[FL63AGNS0004|(+)-Gallocatechin gallate or GCG]]
 
| [[FL63AGNS0004|(+)-Gallocatechin gallate or GCG]]
 
| [[FL63AGNS0001|(-)-Epigallocatechin gallate or EGCG]]
 
| [[FL63AGNS0001|(-)-Epigallocatechin gallate or EGCG]]
 +
| [[FL63AGNS0018|(-)-Gallocatechin gallate]]
 
|-
 
|-
 
! B-ring stereo
 
! B-ring stereo
| &darr; || &darr; || &darr; || &darr;
+
| &darr; || &darr; || &uarr;
 
|-
 
|-
 
! 3-Hydroxyl stereo
 
! 3-Hydroxyl stereo
| &uarr; || &darr; || &uarr; || &darr;
+
| &uarr; || &darr; || &darr;
 
|-
 
|-
 
! Catechins
 
! Catechins
 
| [[FL63ACNS0001|(+)-Catechin]]
 
| [[FL63ACNS0001|(+)-Catechin]]
 
| [[FL63ACNS0002|(-)-Epicatechin]]
 
| [[FL63ACNS0002|(-)-Epicatechin]]
 +
| [[FL63ACNS0004|ent-Catechin]]
 
|}
 
|}

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 FL63AGNS0002.png FL63AGNS0003.png FL63AGNS0017.png
Name (+)-Gallocatechin or
D-Gallocatechin; GC
(-)-Epigallocatechin or
L-Epigallocatechin; EGC
(-)-Gallocatechin or
L-Gallocatechin
B-ring stereo
3-Hydroxyl stereo
Gallate form FL63AGNS0004.png FL63AGNS0001.png FL63AGNS0018.png
(+)-Gallocatechin gallate or GCG (-)-Epigallocatechin gallate or EGCG (-)-Gallocatechin gallate
B-ring stereo
3-Hydroxyl stereo
Catechins (+)-Catechin (-)-Epicatechin ent-Catechin
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