You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
2-(1-ethyltetrazol-5-yl)sulfanyl-1-[4-[(1S)-1-phenylethyl]piperazin-4-ium-1-yl]ethanone The above is the IUPAC name of a molecule. Write its molecular formula.
user
C17H25N6OS+
assistant