You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
2-methyl-N-[(1S)-1-[1-oxo-2-phenyl-8-(trifluoromethyl)isoquinolin-3-yl]ethyl]pyrazolo[1,5-a]pyrimidine-3-carboxamide The above is the IUPAC name of a molecule. Write its molecular formula.
user
C26H20F3N5O2
assistant