Rhodoxanthin

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Rhodoxanthin[1]
IUPAC name	(4E)-3,5,5-Trimethyl-4-[(2E,4E,6E,8E,10E,12E,14E,16E,18E)-3,7,12,16-Tetramethyl-18-(2,6,6-trimethyl-4-oxo-1-cyclohex-2-enylidene)octadeca-2,4,6,8,10,12,14,16-octaenylidene]-1-cyclohex-2-enone
Other names	•4',5'-Didehydro-retro-β-carotene-3,3'-dione •E161f
Identifiers
CAS number	[116-30-3]
PubChem	5281251
SMILES	CC1=CC(=O)CC(C1=CC=C(C)C=CC=C(C)C=CC=CC(=CC=CC(=CC=C2C(=CC(=O)CC2(C)C)C)C)C)(C)C
Properties
Molecular formula	C40H50O2
Molar mass	562.82 g/mol
Appearance	Purple crystals
Melting point	219 °C
Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa) Infobox references

Rhodoxanthin is a xanthophyll pigment with a purple color that is found in small quantities in a variety plants including Taxus baccata. It is also found in the feathers of some birds.^[1] As a food additive it is used under the E number E161f as a food coloring.

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