You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
(2R)-1-acetyl-5-piperidin-1-ylsulfonyl-N-(4-propan-2-ylphenyl)-2,3-dihydroindole-2-carboxamide The above is the IUPAC name of a molecule. Write its molecular formula.
user
C25H31N3O4S
assistant