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-tert-butyl-5-(3,5-difluorophenyl)sulfonyl-6,7-dihydro-4H-pyrazolo[1,5-a]pyrazine .
user
C16H19F2N3O2S
assistant