This prevention was successful when incorporating an amide group into a ring , creating a compound that kept the DPP - 4 inhibitory activity that , did not undergo the intramolecular cyclization .
Was even more selective over different DPP enzymes .
This prevention was successful when incorporating an amide group into a ring , creating a compound that kept the DPP - 4 inhibitory activity that , did not undergo the intramolecular cyclization and was even more selective over different DPP enzymes .