Fractionation and Extraction Optimization of Potentially Valuable Compounds and Their Profiling in Six Varieties of Two <i>Nicotiana</i> Species oleh Csaba Laszlo, Kacper Kaminski, Haifeng Guan, Maria Fatarova, Jianbing Wei, Alexandre Bergounioux, Walter K. Schlage, Sandra Schorderet-Weber, Philippe A. Guy, Nikolai V. Ivanov, Kai Lamottke, Julia Hoeng