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
C=CCn1c(=O)c2nc(N3CCCC(NC(=O)OC(C)(C)C)C3)n(CC#CC)c2c(=O)n1Cc1ccc2ccccc2n1
assistant