Using CC1CC(=O)NN=C1c1ccc2c(c1)C(C)(C)CC(=O)N2C, CCCCBr to produce CCCCN1N=C(c2ccc3c(c2)C(C)(C)CC(=O)N3C)C(C)CC1=O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.