The chemical Retinal has a known molecular formula of C20-H28-O. Synonyms may include: 4-07-00-01253 (Beilstein Handbook Reference), all-trans-Retinal, all-E-Retinal, all-trans-Retinaldehyde, all-trans-Vitamin A aldehyde, Axerophthal, BRN 1914183, EINECS 204-135-8, NSC 122757, trans-Retinal, E-Retinal, Retinaldehyde (ChemID).