Using OCc1ccccc1CC=Cc1cccc(OCc2ccc3ccc(Cl)cc3n2)c1 to produce O=Cc1ccccc1CC=Cc1cccc(OCc2ccc3ccc(Cl)cc3n2)c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.