You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
2-[4-(2,3-dihydro-1,4-benzodioxin-6-ylsulfonyl)piperazin-1-yl]-1-(4-methylpiperidin-1-yl)ethanone is the IUPAC name of a molecule. Please give its molecular formula.
user
C20H29N3O5S
assistant