Using O=C([O-])[O-], CCCCOc1ccc(CCNc2ncnc(CC)c2C(=O)[O-])cc1 to produce CCCCOc1ccc(CCNc2ncnc(CC)c2C(=O)OC)cc1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.