Using O=C(O)CC(=O)O, NC(=O)Nc1ccc(S(=O)(=O)O)cc1 to produce O=C1CC(=O)N(c2ccc(S(=O)(=O)O)cc2)C(=O)N1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.