오동나무 잎의 페놀성 화합물

Phenolic compounds from the leaves of Paulownia Coreana Uyeki

강원대학교 구내림에서 오동나무 잎을 채취하여 아세톤-물(7:3, v/v)로 추출하고 n-hexane, methylene chloride, ethylacetate 및 $H_2O$ 등 네 개의 분획으로 분리한 후 에틸아세테트용성 분획물을 Sephadex LH-20으로 칼럼 크로마토그래피를 수행하였으며 용리용매는 메탄올 수용액과 에탄올-헥산 혼합액을 사용하였다. 그 결과 flavonoid류 화합물인 (+)-catechin, (-)-epicatechin, apigenin, luteolin, taxifolin과 phenolic acid류 화합물인 $\rho$-hydroxybenzoic acid, vanillic acid 및 $\rho$-coumaric acid를 단리 하였다. 단리된 화합물은 NMR 및 MS 스펙트럼을 이용하여 구조를 결정하였다.

The leaves of Paulownia Coreana Uyeki were collected, extracted with acetone-$H_2O$(7:3, v/v), fractionated with n-hexane, methylene chloride and ethylacetate, and freeze dried to give some dark brown powder. The ethylacetate soluble mixture was chromatographed on a Sephadex LH-20 column using a series of aqueous methanol and ethanol-hexane mixture as eluents. Spectrometric analysis such as NMR and MS including TLC were performed to characterize the structures of the isolated compounds. From the ethylacetate fraction, five flavonoides and three phenolic acids were isolated and determined.