Using O=C(O)CNC(=O)OCc1ccccc1, NC(Cc1ccccc1)C(=O)O to produce O=C(CNC(=O)OCc1ccccc1)NC(Cc1ccccc1)C(=O)O, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.