1,4,10,13-Tetraoxa-7,16-diazacyclooctadecane is a crown ether, which can be used: • In the spectroscopic studies of its complex-forming reaction with iodine • To prepare the ligand 7,16-bis(5-t-butyl-2-hydroxybenzyl)-1,4,10,13-tetraoxa-7,16-diazacyclooctadecane • As a ligand in the study of zirconium facilitated hydrolysis of a dipeptide at neutral pH 1,4,10,13-Tetraoxa-7,16-diazacyclooctadecane is a crown ether, which can be used: • In the spectroscopic studies of its complex-forming reaction with iodine • To prepare the ligand 7,16-bis(5-t-butyl-2-hydroxybenzyl)-1,4,10,13-tetraoxa-7,16-diazacyclooctadecane • As a ligand in the study of zirconium facilitated hydrolysis of a dipeptide at neutral pH