Linagliptin Diene Impurity Catalogue L562371 M.W 472.54 M.F C25H28N8O2 Specifications FAQs 8-((R)-3-Aminopiperidin-1-yl)-7-(buta-1,2-dienyl)-3-methyl-1-((4-methylquinazolin-2-yl)methyl)-1H-purine-2,6(3H,7H)-dione
