You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
1-(1-fluoro-9,9-dimethylfluoren-2-yl)-5-(2,4,6-trimethylphenyl)pyrazole-3-carbonitrile The above is the IUPAC name of a molecule. Write its molecular formula.
user
C28H24FN3
assistant