You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
[5-bromo-7-[(3S,5S)-3,5-dimethylpiperidin-1-yl]sulfonyl-2,3-dihydroindol-1-yl]-cyclopropylmethanone The above is the IUPAC name of a molecule. Write its molecular formula.
user
C19H25BrN2O3S
assistant