4,7,13,16-tetraoxa-1,10,21-triazabicyclo[8.8.5]tricosane-19,23-dione

7,16-diphenyl-1,4,10,13-tetraoxa-7,16-diazacyclooctadecane

4-amino-1-[16-(4-aminobutanoyl)-1,4,10,13-tetraoxa-7,16-diazacyclooctadec-7-yl]butan-1-one

1-(1,4,10,13-tetraoxa-7,16-diazacyclooctadec-7-yl)octadecan-1-one

4,7,13,16-tetraoxa-1,10,21,24-tetrazabicyclo[8.8.8]hexacosane