You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
What is the molecular formula of the compound with this IUPAC name 1-[2-(4-acetylpiperazin-1-yl)ethyl]-2-[2-(5-chlorothiophen-2-yl)-2-hydroxyethyl]-3-ethylguanidine ?
user
C17H28ClN5O2S
assistant