Product Name:7-(But-2-yn-1-yl)-8-ethoxy-3-methyl-1-((4-methylquinazolin-2-yl)methyl)-1H-purine-2,6(3H,7H)-dione (Linagliptin Impurity)
IUPAC Name:7-(but-2-yn-1-yl)-8-ethoxy-3-methyl-1-[(4-methylquinazolin-2-yl)methyl]-2,3,6,7-tetrahydro-1H-purine-2,6-dione