You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
2-[(2S)-4-[(3-chloro-1-benzothiophen-2-yl)methyl]-1-(1-propan-2-ylpiperidin-4-yl)piperazin-2-yl]ethanol is the IUPAC name of a molecule. Please give its molecular formula.
user
C23H34ClN3OS
assistant