You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Please write the molecular formula of the molecule 4-[1-[1-[4-(2,4-difluorophenyl)sulfonylpiperazin-1-yl]butan-2-yl]pyrazol-4-yl]-7H-pyrrolo[2,3-d]pyrimidine .
user
C23H25F2N7O2S
assistant