title: Vitamin B 6  analogs. An improved synthesis of 3-hydroxypyridine-4-carboxaldehyde.
mesh_terms: D000085:Acetates / Q000138:chemical synthesis; D000447:Aldehydes / Q000138:chemical synthesis; D011725:Pyridines / Q000138:chemical synthesis; D011736:Pyridoxine / Q000138:chemical synthesis*
chemical_list: D000085:Acetates; D000447:Aldehydes; D011725:Pyridines; D011736:Pyridoxine