You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
N-[(1S)-2-(diethylamino)-1-[1-(4-methylphenyl)sulfonylpiperidin-4-yl]-2-oxoethyl]benzamide The above is the IUPAC name of a molecule. Write its molecular formula.
user
C25H33N3O4S
assistant