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 ethyl 1-[2-tert-butyl-5-(trifluoromethyl)pyrazolo[1,5-a]pyrimidin-7-yl]piperidine-3-carboxylate .
user
C19H25F3N4O2
assistant