Using O=C(CN1CCN(c2cccc(Br)c2)CC1)N1CCN(C2CCC2)CC1, OB(O)c1ccccc1 to produce O=C(CN1CCN(c2cccc(-c3ccccc3)c2)CC1)N1CCN(C2CCC2)CC1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.