1. Department
of Natural Product Chemistry, Key Lab of Chemical Biology of Ministry
of Education, School of Pharmaceutical Sciences, Shandong University, 44 Wenhua West Road, Jinan 250012, People’s Republic of China
2. School
of Chemistry and Chemical Engineering, Shandong University, 27 Shanda
Nanlu, Jinan 250100, People’s Republic of China
3. College
of Life Sciences, Shandong Normal University, 88 Wenhua East Road, Jinan 250014, People’s Republic of China