Linagliptin Impurity Q Catalogue L562382 CAS 1673546-62-7 M.W 568.55 M.F C27H27F3N8O3 Specifications FAQs Synonyms: (R)-N-(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)-2,2,2-trifluoroacetamide