You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
What is the molecular formula of the compound with this IUPAC name 2-(2-pyrrolo[1,2-a]pyrazin-1-yloxyethyl)-6-[4-(trifluoromethoxy)phenyl]-[1,2,4]triazolo[4,3-a]pyridin-3-one ?
user
C22H16F3N5O3
assistant