1. Key Laboratory of Plant Resources and Chemistry in Arid Regions, Xinjiang Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Urumqi, P. R. China
2. Chinese-Tajik Innovation Center of Natural Products, Dushanbe, Tajikistan
3. State Scientifically-Experimental and Production Organization, Academy of Sciences of the Republic of Tajikistan, Dushanbe, Tajikistan
4. Institute of the Chemistry of Plant Substances, Academy of Sciences of the Republic of Uzbekistan, Tashkent, Uzbekistan
5. Department of Chemistry, University of Alabama in Huntsville, Huntsville, AL, USA