Title
| - Synthesis and ligational behavior toward hydrogen and copper(II) ions of the two new oxa-aza macrocyclic receptors 10,13,16-trimethyl-1,4-dioxa-7,10,13,16,19-pentaazacyclohenicosane (Me3[21]aneN5O2) and 13,16,19-trimethyl-1,4,7-trioxa-10,13,16,19,22-pentaazacyclotetracosane (Me3[24]aneN5O3)
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