TY JOUR TI STILBENES CONTENT IN SPRING SPROUTS OF REYNOUTRIA JAPONICA KW stilbenes KW HPLC-MS/MS KW Japanese knotweed KW knotweed KW seasonal variations JO Bulletin of KSAU AU Torokhova, I.N. AU Manyakhin, A.Y. AU Kiselev, K.V. AU Suprun, A.R. PY 2026 IS 0 PB Krasnoyarsk State Agrarian University