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 dppiv inhibitor and belongs to the diabetes treatment class of molecules.
user
COC(=O)N1CC2CC(NCC(=O)N3CCCC3C#N)CC2C1
assistant