You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
What is the molecular formula of the molecule (2S)-2-(4-phenylpiperazin-1-yl)-1-(1,3,4,5-tetrahydropyrido[4,3-b]indol-2-yl)propan-1-one ?
user
C24H28N4O
assistant