Linagliptin Dimer Impurity

Chemical Name: 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)ethyl)quinazolin-2-yl)methyl)-3-methyl-3,7-dihydro-1H-purine-2,6-dione

Smile: CC#CCN1C(C(N(CC2=NC(C=CC=C3)=C3C(C)=N2)C4=O)=O)=C(N4C)N=C1N(CCC5)C[C@@H]5NCCC6=NC(CN(C7=O)C(C(N(C(N(CCC8)C[C@@H]8N)=N9)CC#CC)=C9N7C)=O)=NC%10=C6C=CC=C%10