Using COC(=O)c1cccc(-c2cnc(C(O)CCc3ccc(Oc4ccccc4)cc3)o2)n1 to produce COC(=O)c1cccc(-c2cnc(C(=O)CCc3ccc(Oc4ccccc4)cc3)o2)n1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.