Illustrated Glossary of Organic Chemistry

Retinol (vitamin A): A conjugated alcohol natural product and lipid with the molecular structure shown below. Oxidized to retinal (vitamin A aldehyde) in the liver before incorporation into rhodopsin as part of the vision cycle. IUPAC name (2E,4E,6E,8E)-3,7-dimethyl-9-(2,6,6-trimethylcyclohex-1-enyl)nona-2,4,6,8-tetraen-1-ol.