Using Cc1ncnc(C(=O)O)c1C(=O)OC(C)(C)C, O=C([O-])[O-] to produce COC(=O)c1ncnc(C)c1C(=O)OC(C)(C)C, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.