Using CCOC(=O)c1ccc(Oc2ccc3cc(OCc4ccccc4)ccc3c2)cc1 to produce O=C(O)c1ccc(Oc2ccc3cc(OCc4ccccc4)ccc3c2)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.