You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Convert the IUPAC name of a molecule N-(3-chloro-2,6-diethylphenyl)-4-[2-(2-methylpiperidin-1-yl)-2-oxoethyl]piperazine-1-carboxamide into molecular formula.
user
C23H35ClN4O2
assistant