title: The hydrogen-bonded (protonated ) Schiff base of all-trans-retinal.
mesh_terms: D000588:Amines; D055598:Chemical Phenomena; D002621:Chemistry; D012168:Retinal Pigments; D012545:Schiff Bases; D013057:Spectrum Analysis
chemical_list: D000588:Amines; D012168:Retinal Pigments; D012545:Schiff Bases