Using Nc1ncc(Br)cc1-c1nnc(C2CC2)o1, OB(O)c1cccc(CN2CCOCC2)c1 to produce Nc1ncc(-c2cccc(CN3CCOCC3)c2)cc1-c1nnc(C2CC2)o1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.