Proanthocyanidins |
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| Condensed Tannin; Condensed Tannins; Procyanidins; Polymers, Anthocyanidin; Tannins, Condensed | |
| Dimers and oligomers of flavan-3-ol units (CATECHIN analogs) linked mainly through C4 to C8 bonds to leucoanthocyanidins. They are structurally similar to ANTHOCYANINS but are the result of a different fork in biosynthetic pathways. | |