1. College of Plant Protection, Northwest A&F University, Yangling, Shaanxi 712100, China
2. Shaanxi Research Center of Biopesticide Engineering & Technology, Northwest A&F University, Yangling, Shaanxi 712100, China
3. State Key Laboratory of Crop Stress Biology for Arid Areas, Northwest A&F University, Yangling, Shaanxi 712100, China
4. Department of Chemistry, Wroclaw University, F. Joliot-Curie 14, Wroclaw 50-383, Poland
5. Department of Chemistry, Rutgers University, 73 Warren Street, Newark, New Jersey 07102, United States