(R)-N-(1-(7-(丁-2-炔-1-基)-3-甲基-1-((4-甲基喹唑啉-2-基)甲基)-2，6-二氧代-2-，3，6，7-四氢-1H-嘌呤-8-基)哌啶-3-基)甲酰胺(利格列汀杂质)
(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)Formamide (Linagliptin Impurity)
(R)-N-(1-(7-(丁-2-炔-1-基)-3-甲基-1-((4-甲基喹唑啉-2-基)甲基)-2，6-二氧代-2-，3，6，7-四氢-1H-嘌呤-8-基)哌啶-3-基)甲酰胺(利格列汀杂质) 98%