Estr-9-en-3-one, 11-[4-(dimethylamino)phenyl]-5,17-dihydroxy-17-(1-propynyl)-, cyclic 1,2-ethanediyl acetal, (5a,11b,17b)-

RongNa Biotechnology Co.,Ltd. Is a comprehensive chemical enterprise integrating r&d, production and sales. It is a leading manufacturer and supplier of chemical products in China.We develop, produce and market high quality pharmaceuticals, intermediates, specialty chemicals and OLED intermediates, as well as other fine chemicals.Relying on the laboratory and taking the factory as the base, the company has the whole process ability of fine chemical product research and development, production and processing, testing and packaging to export.We have a research team of excellent engineers, professional technical personnel dedicated to the research and development of new products, in addition, we are also committed to industry and academia to provide customized synthetic research services.The company adheres to the quality control and quality assurance system based on ISO standards. QA and QC are applied to the whole process of raw material control, production process control and finished product quality inspection.To provide customers with high quality products and services is our business philosophy!