You are a chemist. Now you are given a description of a molecule. Please generate a molecule that meets the description.
system
Could you please return a molecule that adheres to this description? The molecule is a ccr5 antagonist and belongs to the hiv treatment class of molecules.
user
C=C1CC(n2c(C)nnc2C(C)C)CCN1CCC(NC(=O)C1CCC(F)(F)CC1)c1cc(C)c(C)s1
assistant