Using BrBr, CCNc1ncccc1C(=O)Nc1c(C)cc(Cl)nc1Cl to produce CCNc1ncc(Br)cc1C(=O)Nc1c(C)cc(Cl)nc1Cl, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.