You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named [(E)-2-[(3R)-1-(benzenesulfonyl)-4-methylidenepyrrolidin-3-yl]ethenyl]-dimethyl-phenylsilane by IUPAC nomenclature, provide its molecular formula.
user
C21H25NO2SSi
assistant