You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
3-(2-chloro-6-fluorophenyl)-7-[2-(2,3-dihydroindol-1-yl)-2-oxoethoxy]-2-methylchromen-4-one The above is the IUPAC name of a molecule. Write its molecular formula.
user
C26H19ClFNO4
assistant