knoxia corymbosa/二酸化ケイ素

Twenty-one non-anthraquinones constituents were isolated for the first time from an ethanol extract of the roots of Knoxia valerianoides by using a combination of various chromatographic techniques including column chromatography over silica gel, Sephadex LH-20, and reversed-phase HPLC. Their

OBJECTIVE To investigate the chemical constituents of the roots of Knoxia valerianoides and their biological activities. METHODS The anthraquinones were isolated by using a combination of various chromatographic techniques including column chromatography over silica gel, Sephadex LH-20, and

Nine compounds were isolated from an ethanol extract of the roots of K. roxburghii by using a combination of various chromatographic techniques including column chromatography over silica gel, MCI gel, Sephadex LH-20, and reversed-phase HPLC. On the basis of physical-chemical properties and