You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Provide the molecular formula for the IUPAC named substance 2-ethyl-6-[4-[3-fluoro-4-(trifluoromethoxy)phenyl]phenyl]-1,2,3,4,4a,5,6,7,8,8a-decahydronaphthalene .
user
C25H28F4O
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