Using CCOC(=O)Cc1c(C(=O)OCC)[nH]c2ccccc12, O=C([O-])[O-] to produce CCOC(=O)Cc1c(C(=O)OCC)n(C)c2ccccc12, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.