Using CCOC(=O)c1cc(-c2ccccc2)nc2c1cnn2C(C)C, BrBr to produce CCOC(=O)c1cc(-c2ccccc2)nc2c1c(Br)nn2C(C)C, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.