1. Institute of the Chemistry of Plant Substances, Academy of Sciences of the Republic of Uzbekistan, Tashkent, Uzbekistan
2. National University of Uzbekistan Named After Mirzo Ulugbek, Tashkent, Uzbekistan
3. Tashkent Institute of Irrigation and Agricultural Mechanization Engineers, Tashkent, Uzbekistan
4. Department of General Educational Disciplines, University of Geological Sciences, Tashkent, Uzbekistan
5. Institute of Inorganic Chemistry, RWTH Aachen University, Aachen, Germany