1-Pyrrolidinecarboxylic acid, 4-hydroxy-2-(3-thiazolidinylcarbonyl)-, 1,1-dimethylethyl ester, (2S,4S)-

4-Des((3-methyl-1-phenyl-1H-pyrazol-5-yl)-1-piperazinyl)-4-hydroxy-N-(tert-butyl formate) Teneligliptin is a possible impurity of Teneligliptin (T018295), a dipeptidyl peptidase-4 (DPP-4) inhibitor that is used to treat type 2 diabetes. It is eliminated via excretion, and has a half-life of 24.2 hours in the human body.