Category:FL6

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Flavan, Leucoanthocyanidin


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Upper classes : FL Flavonoid

2nd Class
FL6F Flavan
Fl6f.png
hydroxy-, methoxyflavan, diffutidin etc.
FL63 Flavan 3-ol
Fl63.png
(epi)catechin, (epi)fisetinidol, mesquitol, etc.
FL64 Flavan 4-ol
Fl64.png
apiforol, luteoforol etc.
FL6D Flavan 3,4-diol
Fl6d.png
leucoanthocyanidin etc.

Catechins refer to a subgroup of Flavan 3-ol derivatives (FL63AC). In a stricter sense, it means (+)-Catechin and its stereoisomer (-)-Epicatechin.

Flavan 3,4-diol and Flavan 4-ol are called leucoanthocyanidin meaning a precursor (white state) of (colored) anthocyans. The term was first used by Rosenheim in 1920. Leuco comes from the Greek word λευκός (leukos) meaning white.

In scientific terms, leucoanthocyanidins refer to monomers, which are converted to anthocyanidins by 2-oxoglutarate iron-dependent oxygenase (i.e., non-haem oxygenase) called anthocyanidin synthase. On the other hand, proanthocyanidins are flavan 3-ol oligomers, which are cleaved to anthocyanidins under strongly acidic conditions.

  • Rosenheim O. Biochem. J., 14, 178-188, 1920.

Database statistics データベース統計

Subcategories

This category has the following 4 subcategories, out of 4 total.

F

  • [×] FL63(empty)
  • [×] FL64(empty)
  • [×] FL6D(empty)
  • [×] FL6F(empty)
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