Using Cc1nc(-c2cn3c(n2)-c2ccc(Br)cc2OCC3)n(C(C)C)n1, Cn1ccc(B2OC(C)(C)C(C)(C)O2)n1 to produce Cc1nc(-c2cn3c(n2)-c2ccc(-c4cnn(C)c4)cc2OCC3)n(C(C)C)n1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.