You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
2-(3-fluoro-5-formylphenyl)-2-methylpropanenitrile;4-fluoro-3-N-methyl-1-N-[3-(7H-purin-6-yl)pyridin-2-yl]benzene-1,3-diamine is the IUPAC name of a molecule. Please give its molecular formula.
user
C28H24F2N8O
assistant