You are a chemist. Now you are given a description of a molecule. Please generate a molecule that meets the description.
system
The molecule is a ccr1 antagonist and belongs to the rheumatoid arthritis treatment class of molecules. Use the above information to create a molecule.
user
O=C(NC1(c2ccnc(Br)c2)CC1)c1cncc2c1cnn2-c1ccc(F)cc1
assistant