Difference between Retinene and Retinal

What is the difference between Retinene and Retinal?

Retinene as a noun is either of two carotenoid pigments found in the retina and produced from vitamin a; retinal while Retinal as a noun is one of several yellow or red carotenoid pigments formed from rhodopsin by the action of light; retinene

We hope you now know whether to use Retinene or Retinal in your sentence.