Using O=C([O-])[O-], CCOC(=O)Cc1nc(N2CCOCC2)cc(=O)[nH]1 to produce CCOC(=O)Cc1nc(N2CCOCC2)cc(=O)n1C, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.