... shown in Scheme 1of diametrically 1,8-disubstituted cyclam derivatives developed by Guilard 7 is very ... de Silva, A. Prasanna; Gunaratne, HQ Nimal; Gunnlaugsson, Thorfinnur; Huxley, Allen JM; McCoy, Colin P.; Rademacher, Jude ... Chemical Reviews (Washington, DC) (1997),.