You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
N-[[(1R)-1-[(1S,2S,4S)-2-bicyclo[2.2.1]heptanyl]ethyl]carbamothioyl]-2-chlorobenzamide The above is the IUPAC name of a molecule. Write its molecular formula.
user
C17H21ClN2OS
assistant