Linagliptin Impurity 60

Chemical Name: Methyl (R)-2-((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)carbamoyl)benzoate

Smile: O=C(OC)C1=CC=CC=C1C(N[C@H]2CN(C(N3CC#CC)=NC(N(C)C(N4CC5=NC(C)=C6C=CC=CC6=N5)=O)=C3C4=O)CCC2)=O