You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named 2-[(4-pyridin-2-ylpiperazin-1-yl)sulfonylmethyl]-4-trimethylsilylbut-3-ynamide by IUPAC nomenclature, provide its molecular formula.
user
C17H26N4O3SSi
assistant