dehydroretinol

dehydroretinol /de·hy·dro·ret·i·nol/ (-ret´i-nol) vitamin A2, a form of vitamin A found with retinol (vitamin A1) in freshwater fish; it has one more conjugated double bond than retinol and approximately one-third its biological activity.

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dehydroretinol

vitamin A₂, the form, C₂₀H₂₈O, of vitamin A found in the retina and liver of freshwater fishes and certain invertebrates and amphibians; it differs from retinol (vitamin A₁) in having one more conjugated double bond and has approximately one-third the biological activity of retinol. Called also retinol₂.