You are a chemist. Now you are given a description of a molecule. Please generate a molecule that meets the description.
system
Build a molecule that meets the requirement: The molecule is a ccr2 antagonist and belongs to both the ccr3 antagonist and ccr5 antagonist classes of molecules.
user
C=CCC1CCC(C=O)N1C(=O)OC(C)(C)C
assistant