Using O=[N+]([O-])c1c(F)cc(Br)c2c1NC(O)(c1cccnc1)CO2 to produce Nc1c(F)cc(Br)c2c1N=C(c1cccnc1)CO2, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.