Using O=C(O)COc1ccc(NC(=O)C=Cc2ccc(O)cc2)cc1 to produce O=C([O-])COc1ccc(NC(=O)C=Cc2ccc(O)cc2)cc1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.