You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
tert-butyl N-[(1S)-1-[5-[(2-chloro-6-fluorophenyl)methylsulfanyl]-1,3,4-oxadiazol-2-yl]-3-methylbutyl]carbamate is the IUPAC name of a molecule. Please give its molecular formula.
user
C19H25ClFN3O3S
assistant