Using O=C([O-])[O-], COC(=O)CN1C(=O)c2cccc(O)c2C1=O to produce COC(=O)CN1C(=O)c2cccc(OC)c2C1=O, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.