You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
3-(6-bromo-1H-benzimidazol-2-yl)-5-[6-(2-bromo-4-fluorophenoxy)pyridin-3-yl]-1,2,4-oxadiazole is the IUPAC name of a molecule. Please give its molecular formula.
user
C20H10Br2FN5O2
assistant