Environment-Friendly Obtaining Betulin Oxo-Derivatives (IMAGE) Tomsk Polytechnic University Caption SRF Ekaterina Kolobova, a co-author of the new method Credit Tomsk Polytechnic 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.