Linagliptin N-Aminocarbonyl Impurity Catalogue L562366 CAS 1955514-80-3 M.W 515.57 M.F C26H29N9O3 Specifications FAQs Linagliptin N-Aminoacyl Impurity ; 8-[(3R)-3-Aminocarbonylamino-1-piperidinyl]-7-(2-butyn-1-yl)-3,7-dihydro-3-methyl-1-[(4-methyl-2-quinazolinyl)methyl]-1H-purine-2,6-dione