title: Bacterial carotenoids. XLII. New keto-carotenoids from Rhodopseudomonas globiformis (Rhodospirillaceae).
mesh_terms: D002338:Carotenoids / Q000096:biosynthesis / Q000302:isolation & purification*; D055598:Chemical Phenomena; D002621:Chemistry; D002854:Chromatography, Paper; D002855:Chromatography, Thin Layer; D009682:Magnetic Resonance Spectroscopy; D013058:Mass Spectrometry; D010649:Phenylalanine; D012241:Rhodopseudomonas / Q000032:analysis*
chemical_list: D002338:Carotenoids; D010649:Phenylalanine