You are a chemist. Now you are given a description of a molecule. Please generate a molecule that meets the description.
system
Build a molecule that meets the requirement: The molecule is a dppiv inhibitor.
user
CNC(=O)c1ccc2c(c1)CCc1cc(C(=O)NC)ccc1C2(CC(NCC(=O)N1C(C#N)CC2CC21)C(C)(C)C)c1nn[nH]n1
assistant