title: Preresonance Raman spectra of crystals of retinal isomers.
mesh_terms: D007536:Isomerism; D008968:Molecular Conformation; D012172:Retinaldehyde; D013057:Spectrum Analysis / Q000379:methods; D014801:Vitamin A / Q000031:analogs & derivatives
chemical_list: D014801:Vitamin A; D012172:Retinaldehyde