You are a chemist. Now you are given a description of a molecule. Please generate a molecule that meets the description.
system
I give you a description of a molecule, and you need to return one molecule in SMILES that meets the description. The description: The molecule is a liquid crystal composition and belongs to the dielectric class of molecules, impacting negative dielectric anisotropy.
user
Cc1ccc(-c2ccc(C)c(C(F)F)c2F)cc1
assistant