You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named (Z,3R)-4-ethenylimino-3-[3-fluoro-5-(trifluoromethyl)phenyl]-3-methyl-1-pyrrolidin-1-ylnon-5-en-1-one by IUPAC nomenclature, provide its molecular formula.
user
C23H28F4N2O
assistant