You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
(2S)-N-[(3-methylphenyl)methyl]-2-(5-pyrrolidin-1-ylsulfonylindol-1-yl)propanamide The above is the IUPAC name of a molecule. Write its molecular formula.
user
C23H27N3O3S
assistant