You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
3-[1-(5-ethylthiophen-2-yl)sulfonylpiperidin-3-yl]oxy-N,N-dimethylpyrazin-2-amine The above is the IUPAC name of a molecule. Write its molecular formula.
user
C17H24N4O3S2
assistant