You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name (3R)-1-(2-chloro-7H-purin-6-yl)-N-[(2R)-1-(1H-indol-3-yl)propan-2-yl]piperidine-3-carboxamide into its molecular formula.
user
C22H24ClN7O
assistant