Using COC(=O)c1ccc(OCc2cccc(OCc3ccc4ccccc4n3)c2)c(OC)c1 to produce COc1cc(C(=O)O)ccc1OCc1cccc(OCc2ccc3ccccc3n2)c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.