Using CS(=O)(=O)n1cc(C2CCN(C(=O)OCc3ccccc3)CC2)c2cc(C#N)ccc21 to produce CS(=O)(=O)n1cc(C2CCNCC2)c2cc(C#N)ccc21, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.