Synonyms: 1,14,39,40,41,42,43,44-Octaazaoctacyclo[12.12.12.13,7.18,12.116,20.121,25.128,32.133,37]tetratetraconta-3,5,7(44),8,10,12(43),16,18,20(42),21,23,25(41),28,30,32(40),33,35,37(39)-octadecaene-5,10-dicarboxamide,N,N'-bis(2-aminoethyl)-, europium complex;1,14,39,40,41,42,43,44-Octaazaoctacyclo[12.12.12.13,7.18,12.116,20.121,25.128,32.133,37]tetratetracontane,europium(3+) deriv.