title: A carbon-13 nuclear magnetic resonance study of the visual chromophores and model compounds.
mesh_terms: D002074:Butanones; D002247:Carbon Isotopes; D055598:Chemical Phenomena; D002621:Chemistry; D003510:Cyclohexanes; D004735:Energy Transfer; D009682:Magnetic Resonance Spectroscopy; D011522:Protons; D012168:Retinal Pigments; D012172:Retinaldehyde / Q000031:analogs & derivatives*; D012243:Rhodopsin; D012996:Solutions / Q000032:analysis; D013729:Terpenes; D014801:Vitamin A / Q000031:analogs & derivatives*
chemical_list: D002074:Butanones; D002247:Carbon Isotopes; D003510:Cyclohexanes; D011522:Protons; D012168:Retinal Pigments; D012996:Solutions; D013729:Terpenes; D014801:Vitamin A; D012243:Rhodopsin; D012172:Retinaldehyde