IMPROVED SYNTHESIS OF SUBSTITUTED 2,6-DIOXABICYLO(3.1.1.)HEPTANES: 1,3-ANHYDRO-2,4,6-TRI-O-BENZYL-2,3,6-TRI-O-p-BROMOBENZYL- AND -2,4,6-TRI-O-p-METHYLBENZYL-β-D-GLUCOPYRANOSE

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• Changsha Goomoo Chemical Technology Co.Ltd

  Contact:+86-731-82197655

  Address:No.649,Chezhan Rd.(N),Changsha,Hunan,China

• Jiangsu Wanlong Chemical Co., Ltd.

  website:http://www.wanlongchem.com

  Contact:+86-511-86810993 0086-511-8681 0888;

  Address:Quanzhou Town, Danyang City, Jiangsu

• Ji'an Kexin Trade Co., Ltd.(expird)

  Contact:86-0796-8187704 18507063190

  Address:ji'an jiangxi

• Jiangxi Province Bethel Pharmaceutical Co., Ltd.

  Contact:+86-795-259 3456 ，+86-15957688008 13566650571

  Address:Huangjindui Chemical Park， Shanggao County ，Yichun city，Jiangxi Province

• Qingzhou Baibang import and export co.,Ltd

  Contact:+86-536-3265899

  Address:No.338, Tuoshan Road