Using Fc1ccc(Nc2ccc(Br)cn2)c(F)c1, COc1ccc(Br)cc1C=O to produce COc1ccc(Br)cc1C(O)c1ccc(Nc2ccc(F)cc2F)nc1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.