The Chemical Structure of Furanosteroids (IMAGE) Japan Science and Technology Agency Caption This is an image of the structures of wortmannin, viridin and demethoxyviridin. Credit The University of Tokyo & Jinan University Usage Restrictions None 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.