Des-(R)-piperidin-3-amine 8-(R)-(Piperidin-3-ylamino) Linagliptin; 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; 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