Using COc1ccc(-c2nc(C(=O)OC(C)C)cc(Cl)c2Cl)cc1 to produce COc1ccc(-c2nc(C(=O)O)cc(Cl)c2Cl)cc1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.