You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
N-[6-fluoro-1-(6-prop-2-enoyl-6-azaspiro[3.4]octan-2-yl)benzimidazol-2-yl]-5-(furan-2-yl)thiophene-2-carboxamide is the IUPAC name of a molecule. Please give its molecular formula.
user
C26H23FN4O3S
assistant