You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name (E)-4-(4-amino-2-methylpyrrolidin-1-yl)-N-[3-[[5-fluoro-4-(3-methylanilino)pyrimidin-2-yl]amino]phenyl]but-2-enamide into its molecular formula.
user
C26H30FN7O
assistant