You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
3-(1H-indol-3-yl)-1-[4-(3-phenylprop-2-enyl)piperazin-1-yl]propan-1-one;hydrochloride is the IUPAC name of a molecule. Please give its molecular formula.
user
C24H28ClN3O
assistant