Using Clc1ccc(Br)cc1-c1nc2ccccc2[nH]1, CC(C)(C)OC(=O)OC(=O)OC(C)(C)C to produce CC(C)(C)OC(=O)n1c(-c2cc(Br)ccc2Cl)nc2ccccc21, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.