1. Institute of Chemistry, Faculty of Natural Sciences and Mathematics, Ss. Cyril and Methodius University, Gazi baba bb, 1000 Skopje, Republic of Macedonia
2. Research and Development Institute, Alkaloid AD, bul. Aleksandar Makedonski 12, 1000 Skopje, Republic of Macedonia
3. Institute of Agriculture, Ss. Cyril and Methodius University, bul. Aleksandar Makedonski bb, 1000 Skopje, Republic of Macedonia