You are a chemist. Now you are given a description of a molecule. Please generate a molecule that meets the description.
system
Generate a molecule that fulfills the requirement: The molecule is a dppiv inhibitor.
user
CC(C)(C)OC(=O)NC(CN1CC2CC1C(=O)N2c1cccc(F)c1)C(=O)N1CCCC1C#N
assistant