Linagliptin Nitroso Dimer Impurity 1

Chemical Name: N-(2-(2-((8-((R)-3-aminopiperidin-1-yl)-7-(but-2-yn-1-yl)-3-methyl-2,6-dioxo-2,3,6,7-tetrahydro-1H-purin-1-yl)methyl)quinazolin-4-yl)ethyl)-N-((R)-1-(7-(but-2-yn-1-yl)-3-methyl-1-((4-methylquinazolin-2-yl)methyl)-2,6-dioxo-2,3,6,7-tetrahydro-1H-purin-8-yl)piperidin-3-yl)nitrous amide

Synonym: Nitroso impurity of LMP Dimer