本研究探討廣藿香 (Pogostemon chablin) 之抗氧化成分，廣藿香粉末依序以正己烷、乙酸乙酯及甲醇萃取、過濾、濃縮後檢測其抗氧化性，三種溶劑萃取物之抗氧化性依序為BHA > 甲醇萃取物 > α-生育醇 > 乙酸乙酯萃取物 > 正己烷萃取物 > 控制組。選擇具抗氧化較佳之廣藿香甲醇萃取物，經XAD-7液相層析區分出顯現強抗氧化性的沖提部分，利用高效液相層析法分析，選擇具抗氧化性，且所含成分較不複雜之區分，重複以高效液相層析分離純化，藉各種光譜分析法鑑定，得到三種純化物質，分別為adenosine、4-hydroxyethylcatachol-1-O-(2'-α-L-rhamnopyranosyl)-β-D glucopyranoside及ο-coumaroyl-β-D-glucopyranoside。

The purpose of this study was to investigate the antioxidative components from Pogostemon chablin. The ground powder of Pogostemon chablin was sequentially extracted with n-hexane, ethyl acetate and methanol. The antioxidative activity of the extract was measured by the ferric thiocyanate method. The order of antioxidative activity was: BHA > methanol extract > α-tocopherol > ethyl acetate extract > n-hexane > control. Due to the strong antioxidative activity of methanol extract, it was fractionated and isolated by various chromatographic method to obtain three pure components identified as adenosine,4-hydroxyethylcatachol- 1-O-(2'-α-L-rhamnopyranosyl)-β-D-glucopyranoside, ο-coumaroyl-β-D-glucopyranoside.