You are a chemist. Now you are given a description of a molecule. Please generate a molecule that meets the description.
system
I give you a description of a molecule, and you need to return one molecule in SMILES that meets the description. The description: The molecule is a ccr3 antagonist.
user
Nc1ccc(Oc2ccc([N+](=O)[O-])cc2S(=O)(=O)N2CCNCC2)cc1
assistant