PRODUCT NAME: Auristatin Impurity 4
Date of Mfg: Sample COA	RETEST DATE: Sample COA

Catalogue Number	AUS-004
Item/Batch Number	Sample COA
Quantity	Sample COA
CAS Number	157967-06-1
Mol. Formula	C14H25NO5
Molecular Wt	287.4 g/mol
IUPAC	(2R,3S)-3-((S)-1-(tert-butoxycarbonyl)pyrrolidin-2-yl)-3-methoxy-2-methylpropanoic aci
Synonyms	(2R,3S)-3-[(2S)-1-[(tert-butoxy)carbonyl]pyrrolidin-2-yl]-3-methoxy-2-methylpropanoic acid
Long Term Storage Condition	2°C to 8°C
Handling instruction	Sample COA

Test	Results
Appearance	No Data Available
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	No Data Available
Purity	NLT 95%
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