Columnidin

Columnidin is an orange red pigment, belonging to the 3-deoxyanthocyanidins[2] found in red-flowered western-hemisphere gesneriad species such as episcias, columneas, sarmientas, and sinningias.

Columnidin

Names
IUPAC name 2-(3,4-Dihydroxyphenyl)-5,7,8-trihydroxychromenium
Other names 5,7,8,3′,4′-pentahydroxyflavylium[1]
Identifiers
3D model (JSmol)	Interactive image
ChemSpider	30780721
PubChem CID	57459464
InChI InChI=1S/C15H10O6/c16-9-3-1-7(5-11(9)18)13-4-2-8-10(17)6-12(19)14(20)15(8)21-13/h1-6H,(H4-,16,17,18,19,20)/p+1 Key: USQSSTLNPXPPHA-UHFFFAOYSA-O InChI=1/C15H10O6/c16-9-3-1-7(5-11(9)18)13-4-2-8-10(17)6-12(19)14(20)15(8)21-13/h1-6H,(H4-,16,17,18,19,20)/p+1 Key: USQSSTLNPXPPHA-IKLDFBCSAT
SMILES C1=CC(=C(C=C1C2=[O+]C3=C(C=C2)C(=CC(=C3O)O)O)O)O
Properties
Chemical formula	C15H11O6
Molar mass	287.244
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Infobox references

The columnidin is named after the gesneriad genus Columnea in which it is found,[3] notably in Columnea hybrida.[4]

References

1. Comparative biochemistry of flavonoids—II. : 3-Desoxyanthocyanins and their systematic distribution in ferns and gesnerads. J.B. Harborne, Phytochemistry, Volume 5, Issue 4, July 1966, Pages 589-600
2. "Gesneriaceae and Scrophulariaceae : Robert Brown and now, Anton Weber, 2004" (PDF). Archived from the original (PDF) on 2015-09-24. Retrieved 2009-08-26.
3. Sinningia Pollinators
4. "Studies on columnidin biosynthesis with flower extracts from Columnea hybrida, Stich, K.; Forkmann, G.; Z. Naturforsch. C 43, 311-314 (1988)". Archived from the original on 2012-10-25. Retrieved 2009-08-26.