You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Provide the molecular formula for the IUPAC named substance 1-[4-[6-cyclopropyl-1-(4-fluorophenyl)pyrazolo[3,4-d]pyrimidin-4-yl]piperazin-1-yl]-2-methoxyethanone .
user
C21H23FN6O2
assistant