Using CCCCS(=O)c1ccc2c(c1)C=Cc1ccccc1N(C(C)=O)C2 to produce CCCCS(=O)c1ccc2c(c1)CCc1ccccc1N(C(C)=O)C2, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.