Using CSc1sc(C(N)=O)c(-c2ccc(C(C)(C)C)cc2)c1C#N to produce CSc1sc(C#N)c(-c2ccc(C(C)(C)C)cc2)c1C#N, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.