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The hydroxyl radical (•OH) scavenging and ferrous ion chelating activities of four isoquinoline alkaloids isolated from Coptis chinensis Franch were studied for the identification of their structural characteristics to scavenge •OH. The •OH was generated via Fe(II)-catalazed Fenton reaction in this study and the reliable measurement of •OH scavenging activities of isoquinoline alkaloids were achieved...
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