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 crth2 antagonist and belongs to the allergic disease treatment class of molecules.
user
CC(C)(O)c1cn(-c2ccc3c(=O)n(-c4ccc(F)cc4)c(CCCCC(=O)O)nc3c2)nn1
assistant