... Our specialities on olive leaf extract are as follows 1.20-40% Oleuropein Olive leaf extract (HPLC)2.16-24% ... water, butanol, ethyl acetate, etc. 7) Almost insoluble in ether, petroleum ether, chloroform, etc. Figure1 The chemical structure of Oleuropein 4. Stability ... direct strong light. 9. COA 10. Our Product Specs Oleuropein 20%(HPLC) PowderUSP,FCC,Ph. EUR., GMP, Kosher Parve(Star-K ...