You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
2-[2-(4-aminophenyl)-3-oxo-1,4-diazaspiro[4.5]dec-1-en-4-yl]-N-(3,4,5-trifluorophenyl)acetamide The above is the IUPAC name of a molecule. Write its molecular formula.
user
C22H21F3N4O2
assistant