Changzhou Helios Biochemical Co., Ltd is a leading manufacturer and supplier for medical intermediates and pesticide intermediates . We specialize in custom synthesis of benzene ring, pyridine and pyrimidine derivatives to help customers to accelerate their drug discovery. We have our own experienced R&D teams and have long-term cooperation with many famous universities and research institutions. Our goal is to provide excellent service and satisfaction to our customers from our knowledgeable staff. It is our pleasure to serve worldwide businesses and organizations.If you have any questions or require any assistance.Please E-mail us anytime at czhelios21@gmail.com or call us at skype18961213068