Using Nc1ncnc2c1c(Br)nn2C1CCC2(CC1)OCCO2, OB(O)c1ccc(Oc2ccccc2)cc1 to produce Nc1ncnc2c1c(-c1ccc(Oc3ccccc3)cc1)nn2C1CCC2(CC1)OCCO2, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.