Using CCOC(=O)C1CCN(C(=O)OC(C)(C)C)CC1, CN(C)CCBr to produce CCOC(=O)C1(CCN(C)C)CCN(C(=O)OC(C)(C)C)CC1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.