Reactor sitting in water bath. (IMAGE) University of Tokyo Caption One of the main challenges came from the complex structure of cefazolin itself. Until now, no one had seemingly been able to develop a reaction method capable of synthesizing a highly purified drug by simply flowing raw materials through a reactor. Credit 2023 H. Ishitani Usage Restrictions Credit must be given to the creator. License CC BY Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.