Using Cn1c(C2CCN(C(=O)OC(C)(C)C)C2)cc2cc(Br)ccc21, CCCC(=O)N(C)OC to produce CCCC(=O)c1ccc2c(c1)cc(C1CCN(C(=O)OC(C)(C)C)C1)n2C, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.