You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
(2R,3S,4R,5S)-3-(3-chloro-2-fluorophenyl)-4-(4-chloro-2-methylphenyl)-4-cyano-5-(2,2-dimethylpropyl)pyrrolidine-2-carboxylic acid;2,2,2-trifluoroacetic acid is the IUPAC name of a molecule. Please give its molecular formula.
user
C26H26Cl2F4N2O4
assistant