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 based on this description: It belongs to the crth2 antagonist class of molecules.
user
CC(=O)N(c1ccccc1)C1CC(C)N(C(=O)c2ccc(-n3cnnc3)cc2)c2ccccc21
assistant