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: The molecule is a anti allergic, crth2 antagonist, and anti allergic agent compound.
user
O=C(O)COc1cccc(CCCc2cc(C(c3ccccc3)c3ccccc3)c[nH]c2=O)c1
assistant