Using CCOC(=O)c1ccc2[nH]c(=O)c(=O)n(Cc3ccc(Cl)cc3Cl)c2c1, O=C([O-])[O-] to produce CCOC(=O)c1ccc2c(c1)n(Cc1ccc(Cl)cc1Cl)c(=O)c(=O)n2C, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.