title: [Typical photochemical reactions of selected natural products].
mesh_terms: D001688:Biological Products; D008027:Light; D011166:Porphyrins / Q000737:chemistry*; D013256:Steroids / Q000737:chemistry*
chemical_list: D001688:Biological Products; D011166:Porphyrins; D013256:Steroids
keywords: LIGHT; PORPHYRINS/chemistry; STEROIDS/chemistry