You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
[3-[[[3-bromo-5-(pyridin-3-ylamino)pyrazolo[1,5-a]pyrimidin-7-yl]-[(2-methylpropan-2-yl)oxycarbonyl]amino]methyl]-1-methylcyclobutyl] tert-butyl carbonate The above is the IUPAC name of a molecule. Write its molecular formula.
user
C27H35BrN6O5
assistant