title: [On the coordination-isomerism ("a-b-isomerism") of cobyrinic acid].
mesh_terms: D055598:Chemical Phenomena; D002621:Chemistry; D013053:Spectrophotometry; D013237:Stereoisomerism; D014805:Vitamin B 12
chemical_list: D014805:Vitamin B 12
vernacular_title: Zur Koordinations-Isomerie ("a-b-Isomerie") der Cobyrsäure.