Let me introduce ourselves-Xian Guanyu Bio-tech. Co. Ltd. as a manufacturer and exporter of herbs extracts in china. we can supply many kinds of herb extracts with high quality, and manufacture the products demanded by customers. following are the main products we are regularly manufacturing: Camptothecin,10-hydroxycamptothecin,7-Ethyl-10-hydroxycamptothecin,Topotecan,Irinotecan, Lutein,Trans-Resveratrol, Polydatin, Evodiamine, Artemisinin, Synephrine hydrochloride,Curcumin, Ferulic acid,Ursolic acid,Chlorogenec acid,Docetaxel,Paclitaxel, 10-DAB, Emodin, Diacerein,Podophyllotoxin, Etoposide,Doxorubicin, Epirubicin,Cytarabine,Octacosanol, 5-HTP, Sinomenine HCL, Genistein,Total Tubeimosides, Puerarin, TanshinonIIA, Rubescensine A, Sclareolide,Lycopene,Luteolin,Capsaicin, Piperine,Chondroitin Sulfate If any of the item be of interest to you. Please donot hesitate to contact us for details. Contacter: Mr. Wedy Cao GUANYU BIO-TECHNOLOGY CO., LTD Add :1002 Lvyuan Building, Weiguo road, Changan District ,Xian China Tel.:0086-29-88907599/85658727 Fax :0086-29-85658727 Cell phone:13319221360 Pc: 710100 E-mail :yewees@gmail.com