Sigma-Aldrich Inc.
Wisconsin, USA Sigma-Aldrich Inc. supplies building blocks and reagents for synthesis in organic and inorganic chemistry. We offer functionalized heterocycles for medicinal applications & syntheses of advanced organic intermediates. Our chiral line includes auxiliaries, enzymes, and reagents for resolution techniq More...
www.sigmaaldrich.com

Tianjin Mid-Chem Co., Ltd.
China Tianjin Mid-Chem Co., Ltd. specializes in supplying fine chemicals and specialty chemicals. Our products include pyrimidine, pyridine, indole, thiophene, quinoline, pyrazine, purine, indene, imidazole, piperidine & their derivates & other heterocycle chemicals, phenol, naphthalene, benzophenone, ben More...
www.mid-chem.com