You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
[4-(2,3-dihydro-1-benzofuran-6-ylmethyl)piperazin-1-yl]-(1-methylsulfinylpiperidin-4-yl)methanone The above is the IUPAC name of a molecule. Write its molecular formula.
user
C20H29N3O3S
assistant