[Fe+3].[H][C@@](COC(=O)[C@]([H])(COC(=O)[C@]([H])(CO)N=C([O-])C1=C([O-])C([O-])=CC=C1)N=C(O)C1=C([O-])C([O-])=CC=C1)(N=C(O)C1=C([O-])C([O-])=CC=C1)C(O)=O