(S)-8-(3-амино哌啶-1-基)-7-(бутил-2-ин-1-基)-3-метил-1-((4-метил喹唑啉-2-基)метил)-3，7-二водорода-1H-пурин-2，6-二кетон(利格列汀примесь)
(S)-8-(3-Aminopiperidin-1-yl)-7-(but-2-yn-1-yl)-3-methyl-1-((4-methylquinazolin-2-yl)methyl)-3，7-dihydro-1H-purine-2，6-dione(LinagliptinImpurity)
(S)-8-(3-Aminopiperidin-1-yl)-7-(but-2-yn-1-yl)-3-methyl-1-((4-methylquinazolin-2-yl)methyl)-3，7-dihydro-1H-purine-2，6-dione(LinagliptinImpurity) 97%