Beijing Taiya Jie Technology Development Co., Ltd.
Telephone021-33690831-8001 13552411790;18616022633
Websitehttp://www.tyj-chem.com/
Aikon International Limited
Telephone025-58859352 19370895928
Websitehttp://www.aikonchem.com
Shaanxi Dideu Medichem Co. Ltd
Telephone+86-29-87569262 +86-15003564040
Websitehttps://www.dideu.com
Shaanxi DIDU pharmaceutical and Chemical Co., Ltd
Telephone029-029-81120477 17792793610
Websitehttp://www.dideu.cn
Jilin Chinese Academy of Sciences-yanshen Technology
Telephone 18143011203
Websitehttp://www.chemextension.com/
Shanghai Daken Advanced Materials Co.,Ltd
Telephone+86-2158073036
Websitehttps://www.dakenchem.com/
DAYANG CHEM (HANGZHOU) CO.,LTD
Telephone+86-88938639 +86-17705817739
Websitewww.dycnchem.com
