title: [Organic natural-product synthesis today. vitamin b 12 as an example].
mesh_terms: D002734:Chlorophyll / Q000138:chemical synthesis; D003038:Cobamides / Q000138:chemical synthesis; D003500:Cyclization; D006418:Heme / Q000138:chemical synthesis; D007536:Isomerism; D008722:Methods; D008956:Models, Chemical; D008961:Models, Structural; D008968:Molecular Conformation; D010777:Photochemistry; D013056:Spectrophotometry, Ultraviolet; D013237:Stereoisomerism; D014805:Vitamin B 12 / Q000031:analogs & derivatives / Q000138:chemical synthesis*
chemical_list: D003038:Cobamides; D002734:Chlorophyll; D006418:Heme; D014805:Vitamin B 12
vernacular_title: Organische Natrustoffsynthese heute Vitamin B 12 als Beispiel