Using CCOC(=O)CBr, CC(C)(C)OC(=O)N1CCc2[nH]c3cc(Cl)c(Cl)cc3c2CC1 to produce CCOC(=O)Cn1c2c(c3cc(Cl)c(Cl)cc31)CCN(C(=O)OC(C)(C)C)CC2, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.