Using CC(C)(C)OC(=O)N1CCN(c2ncnc3ncccc23)CC1 to produce CC(C)(C)OC(=O)N1CCN(c2ncnc3c2CCCN3)CC1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.