You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
[(2S)-1-[4-chloro-2-(trifluoromethyl)anilino]-1-oxopropan-2-yl] (E)-3-(3-methylphenyl)prop-2-enoate The above is the IUPAC name of a molecule. Write its molecular formula.
user
C20H17ClF3NO3
assistant