You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
N-[4-[(5-chloro-2,3-dihydro-1,4-benzodioxin-7-yl)methylsulfanyl]phenyl]acetamide The above is the IUPAC name of a molecule. Write its molecular formula.
user
C17H16ClNO3S
assistant