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
C=CCOc1ccc(OC(=O)C2CCC(c3ccc(-c4ccc(OCC)cc4)c(F)c3F)CC2)c(F)c1F
assistant