TY JOUR TI THEORETICAL STUDY OF THE CARNOSINE N1H TAUTOMER IN THE ZWITTERIONIC FORM KW carnosine zwitterion KW structure KW global reactivity descriptors KW NBO analysis KW IR spectra JO Russian Journal of Biological Physics and Chemisrty AU Demukhamedova, S.D. AU Akverdieva, G.A. PY 2023 IS 8 PB Federal State Educational Institution of Higher Education Sevastopol State University