You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
3-(4-ethoxyphenoxy)-7-[2-(4-fluorophenyl)-2-oxoethoxy]-4a,5,6,7,8,8a-hexahydrochromen-4-one The above is the IUPAC name of a molecule. Write its molecular formula.
user
C25H25FO6
assistant