You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
4-amino-5-[4-[(5,7-difluorobenzimidazol-1-yl)amino]phenyl]-N-methyl-N-(oxan-4-ylmethyl)pyrrolo[2,1-f][1,2,4]triazine-6-carboxamide is the IUPAC name of a molecule. Please give its molecular formula.
user
C27H26F2N8O2
assistant