Using O=CNc1cc(C(O)CNCCOc2ccc(-c3ccc(C(=O)OCc4ccccc4)cc3)cc2)ccc1O to produce O=CNc1cc(C(O)CNCCOc2ccc(-c3ccc(C(=O)O)cc3)cc2)ccc1O, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.