Using Fc1cccc(F)c1C=Nc1ccc(Cl)cc1, NC(=O)c1ccc(Br)cc1 to produce O=C(NC(Nc1ccc(Cl)cc1)c1c(F)cccc1F)c1ccc(Br)cc1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.