You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
5-(difluoromethyl)-N-[5-[(2,2-dimethylpropylamino)methyl]-1-(2-prop-2-enoyl-2-azaspiro[3.3]heptan-6-yl)benzimidazol-2-yl]thiophene-2-carboxamide is the IUPAC name of a molecule. Please give its molecular formula.
user
C28H33F2N5O2S
assistant