Linagliptin impurity 5

Linagliptin impurity 5 product with CAS: 2253964-85-9 is related to Linagliptin. It is also known with other names such as 7-(2-Butyn-1-yl)-3,7-dihydro-3-methyl-1-[(4-methyl-2-quinazolinyl)methyl]-8-[(3S)-3-piperidinylamino]-1H-purine-2,6-dione; (S)-7-(but-2-yn-1-yl)-3-methyl-1-((4-methylquinazolin-2-yl)methyl)-8-(piperidin-3-ylamino)-1H-purine-2,6(3H,7H)-dione. Linagliptin impurity 5 used for Abbreviated New Drug Application (ANDA) & DMF filing to FDA, toxicity study of respective drug formulation, Quality Control (QC), and analytical studies during commercial production of Linagliptin.