Using CCn1cc(Br)c2cnc(NC(=O)OC(C)(C)C)cc21, COC(=O)c1ccc(C(=O)Cl)cc1 to produce CCn1cc(Br)c2cnc(NC(=O)c3ccc(C(=O)OC)cc3)cc21, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.