Doc:FL63AC
From Metabolomics.JP
				
								
				
				
																
				
				
								
				Catechins refer to a subgroup of Flavan 3-ol derivatives (FL63AC). In a stricter sense, it means (+)-Catechin and its stereoisomer (-)-Epicatechin, both of which are naturally abundant.
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| Name |  (+)-Catechin or D-Catechin  | 
 (-)-Epicatechin or L-Epicatechin  | 
 ent-Catechin or (-)-Catechin  | 
 ent-Epicatechin or (+)-Epicatechin  | 
| B-ring stereo | ↓ | ↓ | ↑ | ↑ | 
| 3-Hydroxyl stereo | ↑ | ↓ | ↓ | ↑ | 
| Natural abundance | Ο | Ο |