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 (1S)-11-fluoro-6-hydroxy-5,8-dioxo-N-[(2,4,6-trifluorophenyl)methyl]-2,9-diazatricyclo[7.4.1.02,7]tetradeca-3,6-diene-4-carboxamide ?
user
C20H17F4N3O4
assistant