You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
4-methyl-5-[2-[4-[(3-methyl-1,2,9-oxadiazonin-5-yl)sulfanylmethyl]piperazin-1-yl]ethyl]-3H-2-benzofuran-1-one The above is the IUPAC name of a molecule. Write its molecular formula.
user
C23H28N4O3S
assistant