Using NN1C(=O)c2ccccc2C1=O, CCC(C)(C)C(C=O)CC(C)=O to produce CCC(C)(C)c1cc(C)n(N2C(=O)c3ccccc3C2=O)c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.