Using C1CCNC1, Cc1cn(C)c2c1N(C(=O)CCBr)c1ccccc1NC2=O to produce Cc1cn(C)c2c1N(C(=O)CCN1CCCC1)c1ccccc1NC2=O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.