英文别名N-[(3R)-1-{7-(2-Butyn-1-yl)-3-methyl-1-[(4-methyl-2-quinazolinyl)methyl]-2,6-dioxo-2,3,6,7-tetrahydro-1H-purin-8-yl}-3-piperidinyl]acetamide; N-[(3R)-1-[7-but-2-ynyl-3-methyl-1-[(4-methylquinazolin-2-yl)methyl]-2,6-dioxopurin-8-yl]piperidin-3-yl]acetamide; Linagliptin metabolite m515(1); (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)acetamide; Acetamide, N-((3R)-1-(7-(2-butyn-1-yl)-2,3,6,7-tetrahydro-3-methyl-1-((4-methyl-2-quinazolinyl)methyl)-2,6-dioxo-1H-purin-8-yl)-3-piperidinyl)-; Linagliptin N-Acetyl Impurity; Linagliptin Impurity 34; Linagliptin F 
