| Catalogue Number: | L-4433 | 
| Compound Name: | Linagliptin Impurity 16 | 
| Synonyms: | 7-(but-2-yn-1-yl)-3-methyl-1-((4-methylquinazolin-2-yl)methyl)-3,7-dihydro-1H-purine-2,6-dione | 
| CAS#: | 1911621-52-7 | 
| Alternate CAS#: | |
| Molecular Formula: | C20H18N6O2 | 
| Molecular Weight: | 374.40 | 
Linagliptin Impurity 97 Trifluoroacetate (Mixture of Isomers)
C33H39F3N8O9. C2HF3O2
M.W. 634.70 114.02