Using O=C(C1CCN(c2ccncc2)CC1)N1CCNCC1, BrCc1ccc(Br)cc1 to produce O=C(C1CCN(c2ccncc2)CC1)N1CCN(Cc2ccc(Br)cc2)CC1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.