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
CC(=O)OC1COC2(CN3CCC(C)(NCC(=O)N4CC(C)(C)CC4C#N)CC3)OC(C)(C)OC2C1OC(C)=O
assistant