능소화를 80% MeOH 용액으로 추출하고, 추출물을 EtOAc, n-BuOH 및 물로 분배, 추출하였다. 이 중 EtOAc 분획을 silica gel 및 octadecylsilica gel(ODS) column chromatography로 정제하여 4종의 화합물을 분리하였다. 각 화합물의 화학구조는 NMR, MS 및 IR 등의 스펙트럼 데이터를 해석하여, linoleic acid의 methyl ester, linolenic acid의 methyl ester, ${eta}-sitosterol$ 및 daucosterol로 동정하였다. Daucosterol은 $14{pm}0.04;{mu}M$의 $IC_{50}$ 값으로 FPTase의 활성을 저해하였다.
The flower of Campsis granudiflora K. Schum. was extracted with 80% aqueous MeOH, and the concentrated extract was partitioned with EtOAc, n-BuOH and $H_2O$. From the EtOAc fraction, four compounds were isolated through the repeated silica gel and ODS column chromatographies. From the result of physico-chemical data including NMR, MS and IR, the chemical structures of the compounds were determined as linolenic acid methyl ester, linoleic acid methyl ester, ${eta}-sitosterol$ and daucosterol. Daucosterol inhibited FPTase activity with $IC_{50}$ values of $14{pm}0.04;{mu}M$.
