久久婷婷国产综合精品,久久久久久久性潮,换脸国产av一区二区三区,韩国精品一区二区三区无码视频 ,久久久久成人精品无码

Company Profile

  • Contact Person :
  • Fax:
Purechem is a professional R&D and production base of organic boron chemistry. specialized in Grignard Reaction ,Lithiation Reaction and Suzuki Reaction. main produce Phenylboronic acid and its derivitives.Purechem has seven series of organoboron products including alkenyl boronic acid/ester, aromatic boronic acid/ester, heterocyclic boronic acid/ester, alphatic boronic acid/ester, R/S-MeCBS, diboron acid/pinacol ester, potassium trifluoroborate salt, et.al. we can offer the clients over 600 kinds of organoboron compounds from gram to tons.
PharmaSources Customer Service