(R)-N-(1-(7-(бутил-2-ин-1-基)-3-метил-1-((4-метил喹唑啉-2-基)метил)-2，6-二кислорода代-2)，3，6，7-四водорода-1H-пурин-8-基)哌啶-3-基)этиламид(利格列汀примесь)
(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 (Linagliptin Impurity)
(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 (Linagliptin Impurity) 98%