Using CCOC(=O)c1cnc(Cl)c2c(CBr)csc12, Cc1ccc(-c2cn(C)nn2)cc1O to produce CCOC(=O)c1cnc(Cl)c2c(COc3cc(-c4cn(C)nn4)ccc3C)csc12, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.