Using CN1CCN(c2ccc(N)c(N)c2)CC1, O=C(O)c1n[nH]c2ncc(Br)cc12 to produce CN1CCN(c2ccc(NC(=O)c3n[nH]c4ncc(Br)cc34)c(N)c2)CC1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.