C[C@H]1[C@H](C=C)C2=CC3=C(C)C(CCC(O)=O)=C4C=C5C(CCC(O)=O)=C(C)C6=[N+]5[Fe]5(N34)N3C(=C6)C(C)=C(C=C)C3=C(C1=[N+]25)C1=CC=CC=C1