(R)-N-(2-아세틸페닐)-2-(8-(3-아미노哌啶-1-基)-7-(부틸-2-인-1-基)-3-메틸-2，6-二산소-2，3，6，7-四수소-1H-퓨린-1-基)에틸아미드(利格列汀불순물)
(R)-N-(2-Acetylphenyl)-2-(8-(3-aminopiperidin-1-yl)-7-(but-2-yn-1-yl)-3-methyl-2，6-dioxo-2，3，6，7-tetrahydro-1H-purin-1-yl)acetamide(LinagliptinImpurity)
(R)-N-(2-Acetylphenyl)-2-(8-(3-aminopiperidin-1-yl)-7-(but-2-yn-1-yl)-3-methyl-2，6-dioxo-2，3，6，7-tetrahydro-1H-purin-1-yl)acetamide(LinagliptinImpurity) 98%