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: The molecule is a allergic disease treatment and belongs to the mch antagonist class of molecules.
user
CC(=O)NCC(CCC(=O)N1CCC(O)(c2ccc(Cl)cc2)CC1)(c1ccccc1)c1ccccc1
assistant