(1,4,7,10-tetrakis((N-(1H-imidazol-2-yl)carbamoyl)methyl)-1,4,7,10-tetraazacyclododecane)thulium(III)
(1,4,7,10-tetrakis((n-(1h-imidazol-2-yl)carbamoyl)methyl)-1,4,7,10-tetraazacyclododecane)thulium(iii)