Using CCOC(=O)c1cnc2c(O)cccn2c1=O, BrCc1ccccc1Br to produce CCOC(=O)c1cnc2c(OCc3ccccc3Br)cccn2c1=O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.