Linagliptin Dimer Impurity 1

Chemical Name: 1-((4-(2-(((5R)-5-amino-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)-8-((R)-3-aminopiperidin-1-yl)-7-(but-2-yn-1-yl)-3-methyl-3,7-dihydro-1H-purine-2,6-dione

Synonym: 2-((2-(4-(4-chlorobenzoyl)phenoxy)-2-methylpropanoyl)oxy)-2-methylpropanoic acid

Smile: O=C(N(C)C(N=C(N1CC(NC(CC2=NC(CN3C(N(C)C(N=C(N4CCC[C@@H](N)C4)N5CC#CC)=C5C3=O)=O)=NC6=C2C=CC=C6)C)C[C@@H](N)C1)N7CC#CC)=C7C8=O)N8CC9=NC%10=CC=CC=C%10C(C)=N9