Dear SirWe are the manufactory since 2004, we produce Artemisinin, Dihydroartemisinin, Artemether, Artesunate, Tabersonine, Vincamine, Vinpocetine, Quinine Sulphate, Quinine Hydfochloride, Quinine Dihydrochloride and Resveratrol.If you have interested in these product, please feel free to contact us.Thanks and RegardsAngusPeace International BusinessChongqing Heng Star Biotechnologies Co LtdTel (852) 21807396Fax (852)21807397