1. Medicinal Chemistry Research Group Research Centre for Natural Sciences Magyar tudósok krt. 2 1117 Budapest Hungary
2. NMR Research Laboratory Research Centre for Natural Sciences Magyar tudósok krt. 2 1117 Budapest Hungary
3. School of Pharmacy Xinxiang Medical University Xinxiang Henan 453003 P. R. China
4. School of Chemistry and Chemical Engineering Anhui University of Technology Maanshan Anhui 243002 P. R. China