Using CS(=O)(=O)c1ccc(Cn2ccn(C3CCN(Cc4ccccc4)CC3)c2=O)cc1 to produce CS(=O)(=O)c1ccc(CN2CCN(C3CCNCC3)C2=O)cc1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.