TY JOUR TI SPATIAL STRUCTURE OF EXORPHIN A4 AND A5 MOLECULES KW exorphin KW opioid KW structure KW conformation JO Russian Journal of Biological Physics and Chemisrty AU Akhmedov, N.A. AU Agaeva, L.N. AU Gadjieva, S.N. AU Abbasli, R.M. AU Ismailova, L.I. PY 2019 IS 4 PB Federal State Educational Institution of Higher Education Sevastopol State University