You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
What is the molecular formula of the molecule identified by [3-(1-bicyclo[1.1.1]pentanyl)-1,2,3,3a,4,6,7,7a-octahydropyrazolo[4,3-c]pyridin-5-yl]-(4-chloro-6-fluoro-2,3,3a,4,5,6,7,7a-octahydro-1H-indol-2-yl)methanone ?
user
C20H30ClFN4O
assistant