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
Cc1nnc(C2CC2)n1Cc1cc(C(F)(F)F)ccc1Br
assistant