You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
4-[6-fluoro-1-(4-methylphenyl)sulfonyl-5-[2-(2-methyl-1,3-thiazol-4-yl)ethoxy]indol-3-yl]-N-methylbutanamide is the IUPAC name of a molecule. Please give its molecular formula.
user
C26H28FN3O4S2
assistant