A facile and practical preparation of 5,7-dihydroxy-3-(4-nitrophenyl)-4H-1-benzopyran-4-one

R&D Labs maybe for 137522-87-3

• Zouping Fuhai Technology Development Co., Ltd.

  Contact:+0532-86934525 18660293207

  Address:jiuhu town industrial park Zouping County,bingzhou Provincejiuhu town industrial park

• Xi'an yuanfar international trade company

  website:https://www.yuanfarchemical.com

  Contact:86-029-88745613 ext 828

  Address:Floor19th ,B Building, Oak Block,No.36 South Fenghui Road, Dev. Zone of High-Tech Ind.,Xi’an, China

• Hangzhou Mole's Science & Technology Co.,Ltd.(expird)

  Contact:+86-571-56880228

  Address:15F Guodu development Building, NO.182 Zhaohui Road

• Beijing Harmony Chemical Co., Ltd.

  Contact:86-010-84956928

  Address:Room 207, Jin feng he B building, No 8 Xin Jie Kou Wai Street, Xi Cheng District, Beijing,PRC. 10008

• Beijing ZhongDaXinHe Chemical Product Co.,Ltd(expird)

  Contact:010-52876516

  Address:tongzhoubeiyuan