Using O=C([O-])O, O=C(O)CN1C(=O)c2ccc(Sc3ccccc3)cc2C1=O to produce COC(=O)CN1C(=O)c2ccc(Sc3ccccc3)cc2C1=O, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.