You are a chemist. Now you are given a description of a molecule. Please generate a molecule that meets the description.
system
Come up with a molecule based on the description: The molecule is a muscarinic receptor antagonist.
user
CCCCC=Cc1c(C)cccc1C(F)(F)COCC(=O)N1CC2CC(C)C(C1)N2c1ccc(C#N)cn1
assistant