Linagliptin Dimer Impurity 5

Chemical Name: 8-((R)-3-aminopiperidin-1-yl)-1-((4-(3-(2-((8-((S)-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)-2-(4-methylquinazolin-2-yl)propyl)quinazolin-2-yl)methyl)-7-(but-2-yn-1-yl)-3-methyl-3,7-dihydro-1H-purine-2,6-dione

Smile: O=C(N(C)C(N=C(N1CCC[C@@H](N)C1)N2CC#CC)=C2C3=O)N3CC4=NC5=CC=CC=C5C(CC(C6=NC(C=CC=C7)=C7C(C)=N6)CC8=NC(CN9C(N(C)C(N=C(N%10CCC[C@H](N)C%10)N%11CC#CC)=C%11C9=O)=O)=NC%12=CC=CC=C%128)=N4