英文别名Linagliptin Impurity 7; 7-(2-Butyn-1-yl)-3,7-dihydro-3-methyl-1-[(4-methyl-2-quinazolinyl)methyl]-8-[(3R)-3-piperidinylamino]-1H-purine-2,6-dione; Des-(R)-piperidin-3-amine 8-(R)-(Piperidin-3-ylamino) Linagliptin; Linagliptin impurity E; 7-but-2-ynyl-3-methyl-1-[(4-methylquinazolin-2-yl)methyl]-8-[[(3R)-piperidin-3-yl]amino]purine-2,6-dione; (R)-7-(but-2-ynyl)-3-methyl-1-((4-methylquinazolin-2-yl)methyl)-8-(piperidin-3-ylamino)-1H-purine-2,6(3H,7H)-dione; Linagliptin Impurity 27 
