Active Pharmaceutical Ingredient (IMAGE) University of Bonn Caption The active pharmaceutical ingredient was tested on the bronchia of mice in the study. Credit © Photo: Raphael Reher/Daniela Wenzel/Uni Bonn Usage Restrictions This photo may be used 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.