You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
6-chloro-3-[3-(oxolan-3-yl)-1,2,4-oxadiazol-5-yl]-5-(pyridin-2-ylmethyl)imidazo[1,5-a]quinoxalin-4-one The above is the IUPAC name of a molecule. Write its molecular formula.
user
C22H17ClN6O3
assistant