Abstract

The MeOH extracts obtained from the flower petals of Carthamus tinctorius were solvent-fractionated with EtOAc, n-BuOH, and $H_2O$, successively. From the n-BuOH extract 2 flavonoid compounds were isolated through the repeated silica gel column chromatographies. From not only the results of physico-chemical data including HMBC but also the adaptation of acid hydrolysis, the chemical structures of the compounds were determined as $3-O-[{\beta}-D-glucopyranosyl(1{\rightarrow}2)\;{\beta}-D-glucopyranosyl]\;kaempferol$ and $3-O-[{\alpha}-L-rhamnopyranosyl(1{\rightarrow}6)\;{\beta}-D-glucopyranosyl]\;kaempferol$. The compounds exhibited $IC_{50}$ values in Grab2-Shc activity to be 43 and $47{\mu}g/ml$, respectively.

홍화 MeOH 추출물의 n-BuOH 분획으로부터 silica gel column chromatography를 반복하여 2종의 flavonoid 배당체를 분리, 정제하였다. 화합문의 화학구조를 HMBC를 포함한 NMR, MS, IR과 같은 기기분석 결과와 산가수분해반응을 이용하여 결정, 각각 $3-O-[{\beta}-D-glucopyranosyl(1{\rightarrow}2)\;{\beta}-D-glucopyranosyl]\;kaempferol$ 및 $3-O-[{\alpha}-L-rhamnopyranosyl(1{\rightarrow}6)\;{\beta}-D-glucopyranosyl]\;kaempferol$로 동정하였다. 각 화합물은 Grb2-Shc 결합저해활성$(IC_{50}:43,\;47\;{\mu}g/ml)$을 나타내었다.

Keywords

• Carthamus tinctorius;
• flavonoid glycoside;
• kaempferol;
• Grb2-Shc interaction inhibitor

• 홍화;
• flavonoid 배당체;
• kaempferol 배당체;
• Grb2-Shc 결합저해;