PRODUCT NAME: Linagliptin Impurity 93
Date of Mfg: Sample COA	RETEST DATE: Sample COA

Catalogue Number	LIG-018
Lot Number	Sample COA
Batch Quantity	Sample COA
CAS Number	1339955-47-3
Mol. Formula	C22H26N8O2
Molecular Wt	434.50 g/mol
Long Term Storage Condition	2-8°C Refrigerator	Handling instruction	Sample COA
IUPAC	(R)-8-(3-Aminopiperidin-1-yl)-3,7-dimethyl-1-((4-methylquinazolin-2-yl)methyl)-3,7-dihydro-1H-purine-2,6-dione
Chemical Name	Linagliptin Impurity 93
Synonyms	(R)-8-(3-Aminopiperidin-1-yl)-3,7-dimethyl-1-((4-methylquinazolin-2-yl)methyl)-3,7-dihydro-1H-purine-2,6-dione; 8-[(3R)-3-Amino-1-piperidinyl]-3,7-dihydro-3,7-dimethyl-1-[(4-methyl-2-quinazolinyl)methyl]-1H-purine-2,6-dione

Test	Results
Appearance	White to off-white crystalline powder
Identification by 1H NMR	Sample COA
Identification By IR	Sample COA
Mass (ESI)	Sample COA
Purity	NLT 98%
Wt. Loss by TGA	Sample COA
% Potency	Sample COA
Solubility
QC Release Date	Sample COA
Attachments	Sample COA
Note: This material can be used as a referance standard and is for research purpose ONLY and not for human consumption