Using BrCCCBr, CNC(=O)c1ccc(NC(=O)Nc2ccc(C#N)c(C(F)(F)F)c2)cc1F to produce CNC(=O)c1ccc(N2CCCN(c3ccc(C#N)c(C(F)(F)F)c3)C2=O)cc1F, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.