Established in the 1980s, xielpharma is a GMP pharmaceutical enterprise specializing in the R & D and production of APIs in China. It has an independent professional R & D team, specializing in plant GaCp planting, natural active ingredient extraction and its derivatives synthesis research, anti-tumor series and drug preparation production. It is the main flavonoid drugs rutin, troxerutin series and hesperidin, Diosmin series, genistein series, irinotecan hydrochloride, It is one of the world's leading suppliers of a variety of tinib and other anti-tumor drugs from gram to kilogram. It can provide key intermediates of API, and undertake process development and optimization, analytical method development, impurity and genotoxic impurity analysis and determination, pilot test, process validation and commercial production, customized R & D and production projects, New development of pharmaceutical agent import registration services.