You are a chemist. Now you are given a description of a molecule. Please generate a molecule that meets the description.
system
Can you create a molecule that matches the given characteristics? The molecule is a pgd2 receptor antagonist.
user
CCC(=O)N(c1ccc(C(F)(F)F)cc1)C1CC(C)N(C(=O)c2ccc(F)cc2)c2ccccc21
assistant