Using Clc1ccc(C2(c3ccc4noc(-c5cccc(Cl)c5)c4c3)OCCO2)cc1 to produce O=C(c1ccc(Cl)cc1)c1ccc2noc(-c3cccc(Cl)c3)c2c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.