1. Department of Food Chemistry, Institute of Biochemistry and Technical Biochemistry, University of Stuttgart, Allmandring 5b, 70569 Stuttgart, Germany
2. Institute of Organic Chemistry, University of Stuttgart, Pfaffenwaldring 55, 70569 Stuttgart, Germany
3. Department Technical Biochemistry, Institute of Biochemistry and Technical Biochemistry, University of Stuttgart, Allmandring 31, 70569 Stuttgart, Germany