http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
이기택(Ki Taek Lee),구충환(Chung Hwan Ku),은재순(Jae Soon Eun),신태용(Tae Yong Shin),임종필(Jong Pil Lim),엄동욱(Dong Ok Eorn),지옥표(Ok Pyo Zee),김대근(Dae Keun Kim) 대한약학회 2001 약학회지 Vol.45 No.6
The antioxidant activity of.Persicaria thunbergii(Polygonaceae) was determined by measuring the radical scavenging effect on 1,1-diphenyl-2-picrylhydrazyl (DPPH) radical. The methanol extract of P. thunbergii showed strong radical scavenging activity at an IC50 concentration of 12.2mcg/ml, and thus fractionated by solvent extraction. The EtOAc soluble fraction was stronger than the others, and was further purified by silica gel and Sephadex LH-20 column chromatography. Antioxidant isorhamnetin (1), quercetin (2), quercitrin (3) and isoquercitrin (4) were isolated from the EtOAc soluble fraction. And isorhamnetin-3-sulfate (5) was isolated from the n-BuOH fraction. Compounds 2,3 and 4 were found to have strong antioxidative potency.