英文别名7-but-2-ynyl-8-(2-hydroxyethylamino)-3-methyl-1-[(4-methylquinazolin-2-yl)methyl]purine-2,6-dione; Linagliptin Impurity 41; Linagliptin Impurity 103; 1H-Purine-2,6-dione, 7-(2-butyn-1-yl)-3,7-dihydro-8-[(2-hydroxyethyl)amino]-3-methyl-1-[(4-methyl-2-quinazolinyl)methyl]-; 7-(2-Butyn-1-yl)-3,7-dihydro-8-[(2-hydroxyethyl)amino]-3-methyl-1-[(4-methyl-2-quinazolinyl)methyl]-1H-purine-2,6-dione; Linagliptin Impurity 28 
