Using COc1ccc(N2CCN(C(=O)OC(C)(C)C)CC2)c(C#N)c1 to produce COc1ccc(N2CCN(C(=O)OC(C)(C)C)CC2)c(CN)c1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.