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 dppiv inhibitor.
user
CCCCCNC(=O)C12CCC(N(CC(=O)N3CC(F)CC3C#N)C(=O)OCc3ccccc3)(CC1)CC2
assistant