You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Please write the molecular formula of the molecule N-[[(1R,2R,4R)-2-bicyclo[2.2.1]hept-5-enyl]methyl]-5-pyridin-4-ylpyrazolo[1,5-a]pyrimidin-7-amine .
user
C19H19N5
assistant