CC1=C(CCC(O)=O)C2=CC3=C(CCC(O)=O)C(C)=C4C=C5[N+]6=C(C=C7[N+]8=C(C=C1N2[Fe@]68N34)C(=O)[C@@]7(C)CC(O)=O)C(=O)[C@]5(C)CC(O)=O