You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
tert-butyl 4-[3-(5-fluoro-1-methylbenzimidazol-2-yl)-1,2,4-oxadiazol-5-yl]piperazine-1-carboxylate is the IUPAC name of a molecule. Please give its molecular formula.
user
C19H23FN6O3
assistant