Using CCn1c(=O)c2ccc(C(=O)OC)cc2n(Cc2ccc(Cl)cc2Cl)c1=O to produce CCn1c(=O)c2ccc(C(=O)O)cc2n(Cc2ccc(Cl)cc2Cl)c1=O, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.