Abstract ▼ AI-Helper

Screening of new antioxidants from oriental medicines resulted in the isolation of a new antioxidative compound and eight known compounds from the stem bark of Kalopanax pictus. On the basis of various spectrosopic studies, the structure of the new compound was determined to be 4-rhamnose-3,5- dimet...

Screening of new antioxidants from oriental medicines resulted in the isolation of a new antioxidative compound and eight known compounds from the stem bark of Kalopanax pictus. On the basis of various spectrosopic studies, the structure of the new compound was determined to be 4-rhamnose-3,5- dimethoxybenzoic acid methyl ester. Other known compounds were identified as ferulic acid, 4,5,6,-trihydroxyflavanone, 2" ,4" ,4" -trihydroxychalcone, caffeic acid, coniferyl alcohol, syringin, 1,3-di-O-caffeoylquinic acid. These compounds showed lipid peroxidation inhibitory activity in rat liver microsomes and free radical scavenging activity.