Nico Fleck (IMAGE) University of Bonn Caption During the synthesis of the spin label (flag) on a reflux apparatus. Credit © Foto: Hamed Alaei Usage Restrictions This image may be used together with the press release. License Licensed content 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.