You are a chemist. Now you are given a description of a molecule. Please generate a molecule that meets the description.
system
Generate a molecule that fulfills the requirement: It belongs to the pgd2 receptor antagonist class of molecules.
user
CCc1ccc(C(=O)N2c3cccnc3C(C(=O)N(CC)c3ccc(Cl)cc3)CC2C)cc1
assistant