3-[[(3S,7S,11S)-7,11-bis[(2,3-dioxidobenzoyl)amino]-2,6,10-trioxo-1,5,9-trioxacyclododec-3-yl]carbamoyl]benzene-1,2-diolate; iron(+3) cation ferric 3-[[(3S,7S,11S)-7,11-bis[(2,3-dioxidobenzoyl)amino]-2,6,10-trioxo-1,5,9-trioxacyclododec-3-yl]carbamoyl]benzene-1,2-diolate ferric 3-[[[(3S,7S,11S)-7,11-bis[[(2,3-dioxidophenyl)-oxomethyl]amino]-2,6,10-trioxo-1,5,9-trioxacyclododec-3-yl]amino]-oxomethyl]benzene-1,2-diolate ferric 3-[[(3S,7S,11S)-7,11-bis[(2,3-dioxidobenzoyl)amino]-2,6,10-triketo-1,5,9-trioxacyclododec-3-yl]carbamoyl]benzene-1,2-diolate 3-[[(3S,7S,11S)-7,11-bis[(2,3-dioxidophenyl)carbonylamino]-2,6,10-trioxo-1,5,9-trioxacyclododec-3-yl]carbamoyl]benzene-1,2-diolate; iron(+3) cation