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
CNC(=O)c1ccc2c(c1)CCc1cc(C(=O)NC)ccc1C2(CC(C)NCC(=O)N1C(C#N)CC2CC21)c1n[nH]c(C(C)C)n1
assistant