N-Phthalimide-linagliptin

886588-63-2

Linagliptin Impurity I (EP/BP) (As per EP monograph no 36.2); 7-(but-2-yn-1-yl)-8-[(3R)-3-(1,3-dioxo-1,3-dihydro-2H-isoindol-2-yl)piperidin-1-yl]-3-methyl-1-[(4-methylquinazolin-2-yl)methyl]-3,7-dihydro-1H-purine-2,6-dione; (R)-7-(but-2-yn-1-yl)-8-(3-(1,3-Dioxoisoindolin-2-yl)piperidin-1-yl)-3-methyl-1-((4-methylquinazolin-2-yl)methyl)-3,7-dihydro-1H-purine-2,6-dione; (R)-7-(but-2-yn-1-yl)-8-(3-(1,3-Dioxoisoindolin-2-yl)piperidin-1-yl)-3-methyl-1-((4-methylquinazolin-2-yl)methyl)-1H-purine-2,6(3H,7H)-dione; 7-(2-Butynyl)-8-[(3R)-3-(1,3-dihydro-1,3-dioxo-2H-isoindol-2-yl)-1-piperidinyl]-3,7-dihydro-3-methyl-1-[(4-methyl-2-quinazolinyl)methyl]-1H-purine-2,6-dione;