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 2-[3-bromo-7-[(1-ethylsulfonylpiperidin-3-yl)methylamino]pyrazolo[1,5-a]pyrimidin-5-yl]phenol .
user
C20H24BrN5O3S
assistant