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 ec 3.1.1.7 (acetylcholinesterase) inhibitor.
user
O=S1(=O)CCN(CN2CCS(=O)(=O)NC2)CN1
assistant