Using CCON, CC(=O)N(C(=O)OC(C)(C)C)N1CC(C=O)=NN(C(=O)OC(C)(C)C)C1=O to produce CCO/N=C/C1=NN(C(=O)OC(C)(C)C)C(=O)N(N(C(C)=O)C(=O)OC(C)(C)C)C1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.