title: Anion induced regulation of the absorption maximum of the twenty two carbon analog of the N-retinylidene-n-butylammonium cation.
mesh_terms: D000042:Absorption; D000838:Anions; D002414:Cations, Monovalent; D010777:Photochemistry; D000644:Quaternary Ammonium Compounds; D012172:Retinaldehyde / Q000031:analogs & derivatives*; D013057:Spectrum Analysis; D014801:Vitamin A / Q000031:analogs & derivatives*
chemical_list: D000838:Anions; D002414:Cations, Monovalent; D000644:Quaternary Ammonium Compounds; D014801:Vitamin A; D012172:Retinaldehyde