FIELD: organosilicon compounds, vitamins. SUBSTANCE: invention describes a compound representing silicon-containing derivative of ascorbic acid. This derivative is formed by silicon chain or represents silane comprising at least one radical A of the following formula: 
wherein at least one of radicals L means bivalent radical providing adding A to silicon-containing chain. Proposed compound is used as an antioxidant and/or an agent inhibiting formation of component free radicals, especially, in treatment of stress-oxidant, treatment of effects of solar rays and for aging prophylaxis. EFFECT: valuable medicinal properties of compound. 21 cl, 6 ex
