You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
1-(benzenesulfonyl)-N-[4-(3-ethyl-2,6-dioxopiperidin-3-yl)phenyl]piperidine-3-carboxamide is the IUPAC name of a molecule. Please give its molecular formula.
user
C25H29N3O5S
assistant