1. Institute of Technology of Organic Chemistry, Faculty of Materials Science and Applied Chemistry, Riga Technical University, Paula Valdena Str. 3, Riga LV-1048, Latvia
2. Faculty of Pharmacy, Riga Stradins University, Dzirciema Str. 16, Riga LV-1007, Latvia
3. Latvian Institute of Organic Synthesis, Aizkraukles Str. 21, Riga LV-1006, Latvia