Using BrCc1ccccc1, O=C(O)c1cccc2nc3ccc4c(O)cccc4c3nc12 to produce O=C(O)c1cccc2nc3ccc4c(OCc5ccccc5)cccc4c3nc12, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.