You are a chemist. Now you are given a description of a molecule. Please generate a molecule that meets the description.
system
Give me a molecule that satisfies the conditions outlined in the description: It belongs to the cb1 antagonist class of molecules.
user
Cc1ccc(N2CCN(C(=O)CCC(C)C)CC2c2ccc(Cl)cc2)c(C#N)c1
assistant