Using BrCCCOCc1ccccc1, CCOCc1nc2cnc3ccccc3c2n1CCO to produce CCOCc1nc2cnc3ccccc3c2n1CCOCCCOCc1ccccc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.