JNDXJ is a professional manufacturer of Tiotropium Bromide, Dofetilide, Doxapram Hydrochloride, Entecavir, Me***omidine Hydrochloride and its all steps intermediates, we also in the specialized production of Methyl (Ethyl) piperidine carboxylate, Piperidone, Piperidine methanol, Piperidine carboxyaldehyde etc.