5,8,11,16-tetraazatricyclo[6.6.4.13.13]nonadeca-1(14),2,13(19)-triene

N1-(2-{bis[2-(3-amino-propylamino)ethyl]-amino}-ethyl)-propane-1,3-diamine

6-(2′-aminoethyl)-3,6,9-triaza-1(2,6)-pyridinacyclodecaphane

6,6',6''-tritosyl-8,8',8''-nitrilotri(6-azaoctanol)