Using Nc1nccnc1-c1nncn1-c1cccc(F)c1F, O=C1CCC(=O)N1Br to produce Nc1ncc(Br)nc1-c1nncn1-c1cccc(F)c1F, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.