You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Under IUPAC nomenclature, a molecule named 5-[(2,5-difluorophenyl)methoxy]-3-[1-(oxan-4-yl)pyrazol-4-yl]pyrazolo[1,5-a]pyrimidine is given. What is its corresponding molecular formula?
user
C21H19F2N5O2
assistant