It's a pleasure for us to introduce ourselves as a manufacture industry dealing in Pharmaceutical raw material for almost twenty years.As the most competitive products of our company, Chenodeoxycholic acid, for example, is improved and developed to it's highest purity at 99.0% by HPLC in 2005, Ursodeoxycholic acid is also improved to it's best purity at 99.5% by HPLC.Now Yungang team has established the firm reputation as a leading role in the world .The other staple products of our company are following : Cholic acid, Deoxycholic acid , Hyodeoxycholic acid , Dehydrocholic acid.As popularly as their best quality in this industry market , Changde Yungang Biotechnology Co., Ltd. is a currently exporting these producets to Korea, Japan, Europe, USA and Middle East countries .