You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
N-[(2S)-butan-2-yl]-2-[[(2R)-2-[4-[methyl(methylsulfonyl)amino]phenoxy]butanoyl]amino]benzamide is the IUPAC name of a molecule. Please give its molecular formula.
user
C23H31N3O5S
assistant