Using CCCBr, CN1C(=O)N(Cc2cc3cnc(C#N)nc3n2CC(C)(C)C)C(=O)C12CCNCC2 to produce CCCN1CCC2(CC1)C(=O)N(Cc1cc3cnc(C#N)nc3n1CC(C)(C)C)C(=O)N2C, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.