Using Clc1nc(Cl)nc(N2CCOCC2)n1, CC(C)(C)OC(=O)N1CC(CN)C1 to produce CC(C)(C)OC(=O)N1CC(CNc2nc(Cl)nc(N3CCOCC3)n2)C1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.