Prodrug Concept (IMAGE) University of Vienna Caption This is a schematic illustration of the used prodrug concept: The compound is inactive under normoxia, while hypoxia of the malignant tissue induces release of the active drug. Credit Copyright: Claudia Karnthaler-Benbakka / Angewandte Chemie Usage Restrictions The image may only be used with appropriate caption or credit. 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.