英文别名8-[(3S)-3-Amino-1-piperidinyl]-7-(2-butyn-1-yl)-3-methyl-1-[(4-methyl-2-quinazolinyl)methyl]-3,7-dihydro-1H-purine-2,6-dione; 1-[(4-methyl-quinazolin-2-yl)methyl]-3-methyl-7-(2-butyn-1-yl)-8-(3-(S)-amino-piperidin-1-yl)-2,6-dioxo-2,3,6,7-tetrahydro-1H-purine; Linagliptin Impurity 10