COC(=O)C1=CC(N=NC(C(C)=O)C(=O)NC2=CC=C(NC(=O)C(N=NC3=C(C=CC(=C3)C(=O)OC)C(=O)OC)C(C)=O)C=C2)=C(C=C1)C(=O)OC