Using COC(=O)c1ccc2c(c1)C1C(C2)C(=CN(C)C)C(=O)N1C(=O)OC(C)(C)C to produce COC(=O)c1ccc2c(c1)C1NC(=O)C(=CO)C1C2, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.