TY JOUR TI DETERMINATION OF SAPONINS IN THE LEAVES OF ARCTIUM LAPPA KW herbal medicinal raw materials KW pharmacological activity KW Arctium lappa KW spectrophotometry KW saponins KW oleanolic acid JO CASPIANJOURNALOF MEDICINE AND PHARMACY AU Sergalieva, M.. AU Tsibizova, A.. AU Samotruev, A.. PY 2022 IS 3 PB Astrakhan State Medical University