Using CCS(=O)(=O)Nc1nc(CCc2ccc(CC(=O)OC)cc2)cs1 to produce CCS(=O)(=O)Nc1nc(CCc2ccc(CC(=O)O)cc2)cs1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.