2-[[6-[(3R)-3-(1,3-Dihydro-1,3-dioxo-2H-isoindol-2-yl)-1-piperidinyl]-3,4-dihydro-3-methyl-2,4-dioxo-1(2H)-pyrimidinyl]methyl]benzonitrile

This compound is a defined impurity of alogliptin, a pharmaceutical intermediate used in quality control and manufacturing processes. Its chemical structure contains multiple ring systems and functional groups characteristic of this impurity class.