You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Can you give the molecular formula of the molecule 3-[6-[2-fluoro-6-(trifluoromethyl)phenyl]-1H-benzimidazol-2-yl]-1-oxa-2-azaspiro[4.5]dec-2-ene ?
user
C22H19F4N3O
assistant