1. Key Laboratory of Chemical Biology (Ministry of Education), Department of Natural Product Chemistry, School of Pharmaceutical Sciences, Shandong University, Jinan, People’s Republic of China
2. Natural Products Laboratory, Research and Development Department, Reyoung Pharmaceutical Co., Ltd., Jinan, People’s Republic of China
3. Department of Ophthalmology, Shandong Provincial Hospital, Shandong First Medical University, Jinan, People’s Republic of China
4. Department of Chemistry, COMSATS University Islamabad, Abbottabad, Pakistan