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 2-[6-[[2-(2-chloro-6-fluorophenyl)-5-oxo-6,7-dihydropyrrolo[3,4-b]pyridin-4-yl]methyl]pyridin-3-yl]-N-ethylacetamide .
user
C23H20ClFN4O2
assistant