Using OB(O)c1cncnc1, Clc1nc(N2CCOCC2)c2ncc(Br)cc2n1 to produce Clc1nc(N2CCOCC2)c2ncc(-c3cncnc3)cc2n1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.