You are a chemist. Now you are given a description of a molecule. Please generate a molecule that meets the description.
system
The molecule is a member of the dielectric class and affects negative dielectric anisotropy. Use the above information to create a molecule.
user
CCCCc1ccc(OC(F)(F)c2ccc3c(c2F)C(F)C(F)c2c-3ccc(CCC)c2F)cc1F
assistant