YanTai YuChen Biological Medicine Co. Ltd. is a hi-tech enterprise integrating R&D, production and marketing, and sits at Laiyang, Shandong Province. Our institute boasts a professional R&D team and a production base engaged in research and development, production and marketing of active pharmaceutical ingredients and intermediates. Now, our products include active pharmaceutical ingredients such as tiotropium bromide and dofetilide; piperidinemethanol, ethyl isonipecotate/methyl isonipecotate, piperidinecarboxylicacid and other intermediates and pyridine carboxylic acid, pyridinecarboxaldehyde and other derivants.