Using NC=O, COC(=O)C1CN(C(=O)OC(C)(C)C)CCC1N1CCC1 to produce CC(C)(C)OC(=O)N1CCC(N2CCC2)C(C(N)=O)C1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.