PRODUCT NAME: Linagliptin Dimer Imputiry 2
Date of Mfg: Sample COA	RETEST DATE: Sample COA

Catalogue Number	LIG-001
Item/Batch Number	Sample COA
Quantity	Sample COA
CAS Number	1418133-47-7
Mol. Formula	C₅₀H₅₆N₁₆O₄
Molecular Wt	945.08
Synonyms	8-[(3R)-3-Amino-1-piperidinyl]-1-[[4-[[2-[[8-[(3R)-3-amino-1-piperidinyl]-7-(2-butyn-1-yl)-2,3,6,7-tetrahydro-3-methyl-2,6-dioxo-1H-purin-1-yl]methyl]-1,4-dihydro-4-methyl-4-quinazolinyl]methyl]-2-quinazolinyl]methyl]-7-(2-butyn-1-yl)-3,7-dihydro-3-methyl-1H-purine-2,6-dione; 8-((R)-3-Aminopiperidin-1-yl)-1-((4-((2-((8-((R)-3-aminopiperidin-1-yl)-7-(but-2-yn-1-yl)-3-methyl-2,6-dioxo-2,3,6,7-tetrahydro-1H-purin-1-yl)methyl)-4-methyl-1,4-dihydroquinazolin-4-yl)methyl)quinazolin-2-yl)methyl)-7-(but-2-yn-1-yl)-3-methyl-1H-purine-2,6(3H,7H)-dione; Linagliptin Dimer Impurity
Long Term Storage Condition	Amber Vial, -20°C Freezer, Under inert atmosphere
Handling instruction	Sample COA

Test	Results
Appearance	Off-White to Pale Yellow Solid
Water content by KF/TGA	Sample COA
% Potency = [100 - (Water content by KF)] X HPLC Purity)] / 100	Sample COA
Identification by HNMR	Sample COA
Identification By IR	Sample COA
Mass (ESI)	Sample COA
Solubility	DMSO (Slightly), Methanol (Slightly)
Purity	NLT 98%
Analysis Date (Release Date)	Sample COA
Attachments	Sample COA
Other Information	Sample COA
Note: This material can be used as a referance standard and is for research purpose ONLY and not for human consumption