Using CSc1nc(Nc2cccc(Br)c2)c2c(=O)[nH]ccc2n1, CC(C)(C)OC(=O)NC1CCNCC1 to produce NC1CCN(c2nc(Nc3cccc(Br)c3)c3c(=O)[nH]ccc3n2)CC1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.