1,3,6,8,10,13,16,19-Octaazabicyclo-6,6,6-eicosanecobalt(II) 63218-22-4 76736-28-2 Co(Sep) Cobalt(2+), (1,3,6,8,10,13,16,19-octaazabicyclo(6.6.6)eicosane-N3,N6,N10,N13,N16,N19)-, (OC-6-11)-