Linagliptin Impurity 1

NA

Linagliptin Impurity F (EP/BP) (As per EP monograph no 36.2); 8-[(3R)-3-aminopiperidin-1-yl]-7-(but-2-yn-1-yl)-1-[[4-[(2Ξ)-2-[[(3R)-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]amino]propyl]quinazolin-2-yl]methyl]-3-methyl-3,7-dihydro-1H-purine-2,6-dione; 8-((R)-3-aminopiperidin-1-yl)-7-(but-2-yn-1-yl)-1-((4-(2-(((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)amino)propyl)quinazolin-2-yl)methyl)-3-methyl-3,7-dihydro-1H-purine-2,6-dione;