You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Convert the IUPAC name of a molecule 1-[5-[1-hydroxy-2-(4-pyridin-2-ylpiperazin-1-yl)ethyl]-2-methyl-2,3-dihydroindol-1-yl]propan-1-one into molecular formula.
user
C23H30N4O2
assistant