You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Please write the molecular formula of the molecule (1S,2aS,7bS)-1-phenyl-2a-[1-[4-(trifluoromethyl)phenyl]ethenyl]-2,7b-dihydro-1H-cyclobuta[b][1]benzofuran .
user
C25H19F3O
assistant