You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
N-[2-(4-chlorophenyl)sulfanylethyl]-2-(5-piperidin-1-ylsulfonylthiophen-2-yl)acetamide is the IUPAC name of a molecule. Please give its molecular formula.
user
C19H23ClN2O3S3
assistant