title: Sterically hindered isomers of retinal from direct irradiation of the all-trans isomer. Isolation of 7-cis-retinal 1.
mesh_terms: D008027:Light; D012172:Retinaldehyde / Q000528:radiation effects*; D013237:Stereoisomerism; D014801:Vitamin A / Q000031:analogs & derivatives*
chemical_list: D014801:Vitamin A; D012172:Retinaldehyde