7-(ブチル-2-イン-1-基)-3-メチル-8-(メチルアミノ)-1-((4-メチル喹唑啉-2-基)メチル)-1H-プリン-2，6-(3H，7H)-二ケトン(利格列汀不純物)
7-(But-2-yn-1-yl)-3-methyl-8-(methylamino)-1-((4-methylquinazolin-2-yl)methyl)-1H-purine-2，6(3H，7H)-dione(LinagliptinImpurity)
7-(But-2-yn-1-yl)-3-methyl-8-(methylamino)-1-((4-methylquinazolin-2-yl)methyl)-1H-purine-2，6(3H，7H)-dione(LinagliptinImpurity) 97%