TY JOUR TI CHEMICAL MODIFICATIONS OF DIHYDROQERCETIN AIMING THE SYNTHESIS OF PHOTOCHROMIC DERIVATIVE KW dihydroquercetin KW alkylation KW NMR spectroscopy KW photoswitching JO Modern Technologies and Scientific and Technological Progress AU Stepanov, A.V. AU L'vov, A.G. PY 2022 IS 2022 PB Federal State Funded Educational Establishment of Higher Education «Angarsk State Technical University»