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