Using Cc1nn(C)c(Oc2ccccc2)c1C=NO, CC(C)(C)OC(=O)c1ccc(CBr)cc1 to produce Cc1nn(C)c(Oc2ccccc2)c1C=NOCc1ccc(C(=O)OC(C)(C)C)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.