COA:

         CERTIFICATE OF ANALYSIS

Product Name Campothecin Manufacture Date   10 Apr., 2008
Batch No 080401 Analysis Date   11 Apr., 2008
Deputy Quantity 1Kg Report Date  12 Apr., 2008
Package 1Kg/Drum Source Caikun Bio.

Analysis  Criterion  Results  Test Methods
Appearance yellow to pale white powder Conforms Visual
Identification Positive Positive /
Solubility Standard Conforms Visual
Examination Positive Positive Visual
Loss on drying ≤0.5% 0.4% /
Assay
(by drying sample) 93.0-102.0 % 98.58% HPLC

Storage condition Preserve in tight container, store in cool place, protect from light.
Shelf Life Two years when stored properly
CONCLUSION: It conforms to client’s requirements.

Tester:  AiQiong Wong                 
Quality Authority: JW Guo               
Date：13 Apr., 2008