You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
6-[1-(3-chloro-4,5,6,7-tetrahydropyrazolo[1,5-a]pyridin-2-yl)-3-fluoroprop-2-ynyl]-4H-1,4-benzoxazin-3-one The above is the IUPAC name of a molecule. Write its molecular formula.
user
C18H15ClFN3O2
assistant