title: Synthesis of site-directed chelating agents. I. Pteridine carboxaldehyde thiosemicarbazones.
mesh_terms: D000447:Aldehydes / Q000138:chemical synthesis; D001665:Binding Sites; D002614:Chelating Agents / Q000138:chemical synthesis*; D005493:Folic Acid Antagonists; D006801:Humans; D066298:In Vitro Techniques; D008099:Liver / Q000187:drug effects / Q000201:enzymology; D011621:Pteridines / Q000138:chemical synthesis; D013762:Tetrahydrofolate Dehydrogenase / Q000302:isolation & purification; D013882:Thiosemicarbazones / Q000138:chemical synthesis*
chemical_list: D000447:Aldehydes; D002614:Chelating Agents; D005493:Folic Acid Antagonists; D011621:Pteridines; D013882:Thiosemicarbazones; D013762:Tetrahydrofolate Dehydrogenase