Using Clc1cnc2ccccc2n1, CC(C)(C)OC(=O)N1CC2CNCC21 to produce CC(C)(C)OC(=O)N1CC2CN(c3cnc4ccccc4n3)CC21, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.