Using BrC(Br)(Br)Br, CC(=O)N1CC(CCO)c2c(C)cc(C)cc21 to produce CC(=O)N1CC(CCBr)c2c(C)cc(C)cc21, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.