1. Shaanxi Key Laboratory of Natural Products & Chemical Biology
2. College of Chemistry & Pharmacy
3. Northwest A&F University
4. Shaanxi 712100
5. PR China
6. College of Chemistry
7. Chemical Engineering and Materials Science
8. Collaborative Innovation Center of Functionalized Probes for Chemical Imaging in Universities of Shandong
9. Shandong Normal University
10. Jinan 250014