You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Please write the molecular formula of the molecule (Z)-6-[(1R,2R,3S,4S)-3-[[(4-chloro-2-fluorophenyl)sulfonylamino]methyl]-2-bicyclo[2.2.1]heptanyl]hex-5-enoic acid .
user
C20H25ClFNO4S
assistant