Synonyms: 55H,61H-6,9:33,36-Diimino-5,37:10,32-di[2]pyrrolyl[5]ylidene-16H,20H,24H,43H,47H,51H-tetrabenzo[o,o',w,w']benzo[1,2-g:4,5-g']bis[1,5,10,14]tetraoxacyclotetracosin,iron deriv.;55H,61H-6,9:33,36-Diimino-5,37:10,32-di[2]pyrrolyl[5]ylidene-16H,20H,24H,43H,47H,51H-tetrabenzo[o,o',w,w']benzo[1,2-g:4,5-g']bis[1,5,10,14]tetraoxacyclotetracosin-20,22,47,49-tetrone,17,18,25,26,44,45,52,53-octahydro-, iron complex