You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named 2-[4-[2-[[2-[(2,6-difluorophenyl)carbamoyl]-1-benzothiophen-3-yl]oxy]ethoxy]phenyl]acetic acid by IUPAC nomenclature, provide its molecular formula.
user
C25H19F2NO5S
assistant