Dehydroretinal

Dehydroretinal, more specifically, 3,4-dehydroretinal, is a derivative metabolite of retinal[1] belonging to the group of vitamin A2 as a retinaldehyde form, besides the endogenously present 3,4-dehydroretinol and 3,4-dehydroretinoic acid.[2][3]

Dehydroretinal

Names
Other names 3,4–didehydroretinaldehyde
Identifiers
CAS Number	472-87-7
3D model (JSmol)	Interactive image
3DMet	B00875
ChEBI	CHEBI:28537
ChemSpider	4444397
ECHA InfoCard	100.006.781
EC Number	207-457-7
KEGG	C05918
MeSH	Dehydroretinal
PubChem CID	5280866
UNII	HV8T003XO1
CompTox Dashboard (EPA)	DTXSID30878517
InChI InChI=1S/C20H26O/c1-16(8-6-9-17(2)13-15-21)11-12-19-18(3)10-7-14-20(19,4)5/h6-13,15H,14H2,1-5H3/b9-6+,12-11+,16-8+,17-13+ Key: QHNVWXUULMZJKD-OVSJKPMPSA-N InChI=1/C20H26O/c1-16(8-6-9-17(2)13-15-21)11-12-19-18(3)10-7-14-20(19,4)5/h6-13,15H,14H2,1-5H3/b9-6+,12-11+,16-8+,17-13+ Key: QHNVWXUULMZJKD-OVSJKPMPBA
SMILES O=C\C=C(\C=C\C=C(\C=C\C1=C(\C=C/CC1(C)C)C)C)C
Properties
Chemical formula	C20H26O
Molar mass	282.42 g/mol
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
Infobox references

The livers of some freshwater fishes and some fish found in India contain a higher ratio of dehydroretinal to retinal than do other species.[4][5]

References

1. Gibney, Michael J.; Margetts, Barrie M.; Kearney, John M.; et al., eds. (2012), Public Health Nutrition, John Wiley & Sons, p. 210, ISBN 1118574222
2. Törmä H, Vahlquist A (1985). "Biosynthesis of 3-dehydroretinol (vitamin A2) from all-trans-retinol (vitamin A1) in human epidermis". J. Invest. Dermatol. 85 (6): 498–500. doi:10.1111/1523-1747.ep12277290. PMID 4067325.
3. Vahlquist A (1980). "The identification of dehydroretinol (vitamin A2) in human skin". Experientia. 36 (3): 317–318. doi:10.1007/bf01952299. PMID 7371787.
4. MortonRA, Stubbs AL (1946). "Ling cod and other fish liver oils rich in vitamin A2". Biochem J. 40 (5–6): lix. PMID 20277273.
5. Food and Agriculture Organization of the United Nations (1967), Requirements of Vitamin A, Thiamine, Riboflavin & Niacin: Report of a Joint Fao-Who Expert Group, United Nations, p. 26, ISBN 9251004536

See also

• Retinene