[1] Tech Univ Carolo Wilhelmina Braunschweig, Inst Pharmaceut Biol, D-38106 Braunschweig, Germany
[2] Leibniz Inst Plant Biochem, Dept Nat Prod Biotechnol, D-06120 Halle Saale, Germany
[3] Leibniz Inst Plant Biochem, Dept Secondary Metab, D-06120 Halle Saale, Germany