Cyclovariegatin

Cyclovariegatin is a pigment.[2] Its chemical name is 1,4-Dihydro-2,7,8-trihydroxy-3-(3,4-dihydroxyphenyl)-l,4-dioxodibenzofuran. It is distinguishable by its UV-Vis spectra with maxima at 257, 296, and 430 nm. The variants cyclovariegatin-pentaacetate, cyclovariegatin-2,3',8-triacetate, and cyclovariegatin-2-acetate have also been described. It is derived from atromentin.[3] It has been isolated from the browned skin of Suillus grevillei var. badius, and becomes the pigment thelephoric acid.

Cyclovariegatin

Names
IUPAC name 4-(1,2,4,7,8-pentahydroxydibenzofuran-3-yl)cyclohexa-3,5-diene-1,2-dione
Identifiers
CAS Number	55692-59-6[1]
3D model (JSmol)	Interactive image
PubChem CID	13889551
InChI InChI=1S/C18H10O8/c19-8-2-1-6(3-9(8)20)13-15(23)16(24)14-7-4-10(21)11(22)5-12(7)26-18(14)17(13)25/h1-5,21-25H Key: OBXJPYUGUFLTRB-UHFFFAOYSA-N
SMILES C1=CC(=O)C(=O)C=C1C2=C(C3=C(C4=CC(=C(C=C4O3)O)O)C(=C2O)O)O
Properties
Chemical formula	C18H10O8
Molar mass	354.270 g·mol^−1
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
Infobox references

See also

• Pulvinic acid
• Pulvinone
• Vulpinic acid

References

1. Yannai, Shmuel (2003). Dictionary of Food Compounds with CD-ROM: Additives, Flavors, and Ingredients. CRC Press. ISBN 9781420068450.
2. Gill, M., and Steglich, W. (1987) Pigments of fungi (Macromycetes). Prog Chem Org Nat Prod 51: 1–317.
3. Elisabeth Jägers, Elisabeth Hillen-Maske, Holger Schmidt, Wolfgang Steglich und Egon Horakb. Pilzfarbstoffe, 55 [1] Acetylierte Terphenylchinon-Derivate aus Anthracophyllum -Arten (Agaricales)Z. Naturforsch. 42b, 1354—1360 (1987); eingegangen am 30. März 1987