You are a chemist. Now you are given a description of a molecule. Please generate a molecule that meets the description.
system
Suppose there is a molecule that meets the following description: It belongs to the crth2 antagonist class of molecules. Please write the SMILES representation of it.
user
COC(=O)Cn1c(C)c(-c2ccc(=O)n(Cc3cccc(F)c3F)c2)c2ccccc21
assistant