Using O=C(Nc1ccccc1)Nc1nn(Cc2ccccc2)cc1C(=O)OCc1ccccc1 to produce O=C(Nc1ccccc1)Nc1nn(Cc2ccccc2)cc1C(=O)O, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.