Using O=C(O)Cc1ccc(-n2cnnn2)cc1Br, CC(C)(C)OC(=O)N1CCNCC1 to produce CC(C)(C)OC(=O)N1CCN(C(=O)Cc2ccc(-n3cnnn3)cc2Br)CC1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.