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3. H.J. Schneider, A.K. Yatsimirsky, Principles and Methods in Supramolecular Chemistry, Wiley, New York, 2000.
4. D. Parker, Macrocycle Synthesis: A Practical Approach, OUP, Oxford, 1996.
5. Chemistry of heterocyclic compounds. 20. Multidentate chelating agents. Pyridine macrocyclic ether synthesis