利格列汀杂质  Linagliptin impurity

LGT-A  8-bromo-7-(but-2-yn-1-yl)-3-methyl-1((4-methylquinazolin-2-yl)methyl)-3,7dihydro-1H-purine-2,6-dione  853029-57-9
LGT-B  tert-butyl (R)-(1-(7-(but-2-yn-1-yl)-3methyl-1-((4-methylquinazolin-2yl)methyl)-2,6-dioxo-2,3,6,7-tetrahydro1H-purin-8-yl)piperidin-3-yl)carbamate 668273-75-4

LGT-C  tert-butyl (R)-(1-((4-methylquinazolin-2yl)methyl)piperidin-3-yl)carbamate

LGT-D  tert-butyl (R)-(1-(7-(but-2-yn-1-yl)-3methyl-2,6-dioxo-2,3,6,7-tetrahydro-1Hpurin-8-yl)piperidin-3-yl)carbamate  666816-91-7
LGT-E  tert-butyl (S)-(1-(7-(but-2-yn-1-yl)-3methyl-1-((4-methylquinazolin-2yl)methyl)-2,6-dioxo-2,3,6,7-tetrahydro1H-purin-8-yl)piperidin-3-yl)carbamate 668273-75-3
LGT-F  (R)-N-(1-(7-(but-2-yn-1-yl)-3-methyl-1((4-methylquinazolin-2-yl)methyl)-2,6dioxo-2,3,6,7-tetrahydro-1H-purin-8yl)piperidin-3-yl)-2,2,2trifluoroacetamide 1673546-62-7

LGT-G  (S)-8-(3-aminopiperidin-1-yl)-7-(but-2yn-1-yl)-3-methyl-1-((4methylquinazolin-2-yl)methyl)-3,7dihydro-1H-purine-2,6-dione  668270-11-9