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